Python variables


Variables in Python (x,y,z). They can be used later in the program

Variables can hold numbers that you can use one or more times.

Numbers can be of one of these datatypes:

  • integer (1,2,3,4)
  • float (numbers behind the dot)
  • boolean (True or False)

Related courses

Numeric variables example

Example of numeric variables:

x = 1
y = 1.234
z = True

You can output them to the screen using the print() function.

x = 1
y = 1.234
z = True

Python supports arithmetic operations like addition (+), multiplication (*), division (/) and subtractions (-).

#!/usr/bin/env python
x = 3
y = 8
sum = x + y

More mathematical operations

User input

Python 3
Use the input() function to get text input, convert to a number using int() or float().

#!/usr/bin/env python
x = int(input("Enter x:"))
y = int(input("Enter y:"))
sum = x + y

Python 2 (old version)
You can also ask the user for input using the raw_input function:

#!/usr/bin/env python
x = int(raw_input("Enter x:"))
y = int(raw_input("Enter y:"))
sum = x + y
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59 Responses to Python variables

  1. Rathinavelu Thiruvenkatam says:

    ” floats have numbers behind comma” Sir, I do not see any comma;perhaps you mean dot.
    Please correct me if I am wrong.
    Thank you.

  2. Sigitas says:

    Correcting integer section replace from sys.maxint to sys.maxsize python 3.

  3. Wenuka says:

    Do we have to use ” #!/usr/bin/env python ” always at the beginning?

  4. Topssy says:

    num = input(‘Give me a number? ‘)
    print(‘You said: ‘ + str(num)) pls explain the programme above.