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PY1 - Python Programming Project For Beginners | Car Rental System | With Detailed Explanation - YouTube
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i know you told your friend you're not
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okay
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and tell me what's wrong and why you
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never said you felt that way
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i guess you're trying to stay strong and
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fake and smile until i look
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as
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[Music]
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i don't look at anything the same way
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gotta build up on my thoughts sitting in
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an ashtray i'm sorry that i'm so
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inconvenient okay just let me be me and
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i'll stay out of your way i can see the
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way you look at me i'm such a disgrace i
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never really asked to be brought into
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this place you wanna love me well then
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baby have a taste all the highs and the
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lows know you'll never be the same i
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don't really wanna hurt you but i can't
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control the pain if you stick it by my
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side maybe we could be okay okay okay
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maybe you could be the change i need
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today i promise that i'm never found
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this way i really hope that you will
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choose
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[Music]
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as you fade
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[Music]
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you fade away
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[Music]
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okay
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i know i'm not perfect for some
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you told days friend you're not okay
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and tell me what's wrong and why you
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never said you felt that way
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because you're trying to stay strong and
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fake or smile until
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as you fade
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you fade away
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oh
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i know you told your friend you're not
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okay
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and tell me what's wrong why you never
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said you felt that
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okay way us start with the python
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program
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for the ide i'm using pycharm community
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2021.1.2
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[Music]
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which is free
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this year
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so it's pyjama2021.1.2
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community version
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the name of this project is superb car
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rental
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and the database is csv text files
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okay the program structure
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in the beginning
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we put all the functions at the top for
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example here i have
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main menu
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function
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[Music]
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it ends here
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this is one function
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then goes on another function
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and so on and so on all the functions
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all these are functions
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okay the last function is check date
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rented valid this is the last function
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until here
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okay
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so how do i call the program
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i call the program by calling one of the
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functions that's main menu
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normally you will write all the
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functions at the top you will start a
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program like this to call a function now
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let's go to the
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main menu function
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this is the main menu function
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in the main menu function
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we use the following controls the volume
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there is this one
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what is the value
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with the one loop we can execute a set
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of statements
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as long as a condition is true
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that is
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here we say
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index equals to 1
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while index equals to 1 the program flow
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will always be inside the
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while loop
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to get out the value
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you say something like that
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index equals to zero
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if index equals to zero
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then it will get out the while loop okay
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let's do some warm-up on this one loop
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let's go to the bottom of the screen
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now we disable this main menu we don't
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want to run this yet okay let's look at
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example one let's say you want to print
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a number from one to five this is how
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you do it
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okay
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to use this value you will say
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i equals to 1 in the beginning
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so
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while i
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is less than 6
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it goes on
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until we come to a situation where
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i
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is six
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if is i less than six no if it's not
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then it will get get out of the program
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[Music]
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so we should be expecting a result
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one two three four five
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okay let's save the program
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and let's run the program
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okay when we run the program
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we get the the output one two three four
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five
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this is what we want that's example one
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that's how the wall loop works
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okay let's look at example two
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let's say you want the user to stay
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inside the while loo
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until he enters zero
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okay if we start from here j equals to
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one
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if we want the program flow
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to exit the one loop
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we say j equals to zero
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if j equals to zero then it will exit
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the value
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it says enter number
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if enter 5 randomly is we are still in
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the loop
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if we key in
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4
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we are still in the loop
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if we want to get out of this blue of
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this one loop
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we keys in zero
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so those are the two examples regarding
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one loop
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now let's go back to the main menu
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function
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so the main menu functions will have
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four options here
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at admin user
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so the main menu will have four options
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here
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number one admin user member customer
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non-member customer exit
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now if i keys in one what happened if i
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keys in one it will ask for my password
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i type in password three
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then it will allow me to go to
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admin menu
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let's do that
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okay i'm in the main menu
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alkene one
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my password is passed on to three
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okay this is the admin menu
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okay let's go back to the main menu
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function
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okay take note of this
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if password equals to
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pass one to three
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normally
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after the user keys in the password
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you will check the validity by matching
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user id and password from the database
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in this case
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we did not do the checking
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because we want to make this tutorial
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simple
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so that the beginner python learner
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is not overwhelmed with too many things
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however
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as you progress in this video series
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you will see more examples of reading
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text files
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that is the database
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and move on to build the project
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when you as the beginning learner reach
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that stage
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you will have built your confidence
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and skills
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to take on more new concepts what you
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have learned so far
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all the python functions are placed in
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one location
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two
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to start the program
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you call the python function
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in your example
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you call main menu function
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see
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how to use the while loop for the menu
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driven program
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in your example
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you allow the user to select option
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in the menu driven program
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the user will stay in the menu as long
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as the index equals to one
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here we say one index equals to one
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as long as the index equals to one
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the program logic will
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continue to run
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within the
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value if you want to get out of this
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value then you say
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index equals to zero if index equals to
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0 then you get out of the while loop for
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example here i've got options 1 to 4
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only
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so
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if the user enters 5 which is not valid
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he will be confined to the value here
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if the user decides to exit the program
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then we say index equals zero this will
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allow the program flow to exit the while
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loop
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okay that's all folks
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if you like my video please give a
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thumbs up
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and subscribe to my video
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see you again in the next video bye bye
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