Python || Simple Math Using Int & Float

May 29, 2013 admin No comments

This page will display the use of int and float data types. Since python is a flexible programming language, variable data types do not need to be explicitly declared like in C/C++/Java, but they still exist within the grand scheme of things.

==== ADDING TWO NUMBERS TOGETHER ====

To add two numbers together, you will have to first declare your variables by doing something like this.





		
		
			#1 - Adding 2 Numbers Together
			
Python
			
			# =============================================================================
#    Author: Kenneth Perkins
#    Date:   May 29, 2013
#    Updated: Feb 16, 2021
#    Taken From: http://programmingnotes.org/
#    File:  addition.py
#    Description: Demonstrates adding numbers together
# =============================================================================
def main():
    # declare variables
    # NOTE: data types do not need to be declared
    num1 = 0;
    num2 = 0;
    total = 0;

    # in Python, input is automatically cast as strings
    # so we convert everything to integers in order to do math
    num1 = int(input("Please enter the first number: "))
    num2 = int(input("Please enter the second number: "))

    # calculate the sum of the two numbers here
    total = num1 + num2

    # display data to the screen. The argument list is
    # similar to that of the "printf" function in C/C++
    print("The sum of %d and %d is: %d" % (num1, num2, total))

if __name__ == "__main__":
    main()
# http://programmingnotes.org/
			
				
					
				
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						# =============================================================================
#    Author: Kenneth Perkins
#    Date:   May 29, 2013
#    Updated: Feb 16, 2021
#    Taken From: http://programmingnotes.org/
#    File:  addition.py
#    Description: Demonstrates adding numbers together
# =============================================================================
def main():
    # declare variables
    # NOTE: data types do not need to be declared
    num1 = 0;
    num2 = 0;
    total = 0;
 
    # in Python, input is automatically cast as strings
    # so we convert everything to integers in order to do math
    num1 = int(input("Please enter the first number: "))
    num2 = int(input("Please enter the second number: "))
 
    # calculate the sum of the two numbers here
    total = num1 + num2
 
    # display data to the screen. The argument list is
    # similar to that of the "printf" function in C/C++
    print("The sum of %d and %d is: %d" % (num1, num2, total))
 
if __name__ == "__main__":
    main()
# http://programmingnotes.org/

Notice in lines 12-14, I declared my variables, giving them a name. You can name your variables anything you want, with a rule of thumb as naming them something meaningful to your code (i.e avoid giving your variables arbitrary names like “x” or “y”). In line 22 the actual math process is taking place, storing the sum of “num1” and “num2” in a variable called “total.” I also initialized my variables to zero. You should always initialize your variables before you use them.