In this article, we will learn about python program to subtract two integers with examples.

Getting Started

The task is to subtract two integers in python. For example,

If a = 12 and b = 3, then output is 12 – 3 = 9.

We can do so in multiple ways –

• Simple Approach
• Using User Input
• Using User Input(Command Line Arguments)
• Using Lambda
• Using Function

Simple Approach

Using – operator, we can subtract two numbers in python as shown below –

 
a1 = 8
a2 = 4
 
result = a1 - a2  # Subtract using - operator
print("Result:", result)

Output:

 
Result: 4

Using User Input

We can take input from user using input() method. Then, type cast those input to integer using int() method.

 
a1 = int(input("Enter an integer"))
a2 = int(input("Enter another integer"))

result = a1 - a2
print("{0} - {1} is {2}" .format(a1, a2, result))

Output:

 
Enter an integer
23
Enter another integer
12
23 - 12 is 11

Using User Input (Command Line Arguments)

We can accept input from command line arguments using sys.argv present in sys module in python. For example,

• Method 1

  a1, a2 = sys.argv[1:3] accepts two values from command line arguments as store them in variable a1 and a2.

   
  import sys
  a1, a2 = sys.argv[1:3]
  print("Result:", int(a1) - int(a2))
  

  Output:

   
  Result: 57
  

  Run above code with command line arguments as 65 and 8.

• Method 2

  If we don’t two restrict numbers of inputs to be read from command line arguments, we can omit second argument in sys.argv.

   
  import sys
  a1, a2 = sys.argv[1:]
  print("Result:", int(a1) - int(a2))
  

  Output:

   
  Result: 57
  

  Run above code with command line arguments as 65 and 8.

Using Lambda

Using lambda function, we can wrap logic to subtract two integers as shown below –

 
if __name__ == "__main__" :
    a1 = 768
    a2 = 24
 
    # Subtract two integers
    subtract_twoInt = lambda a1, a2 : a1 - a2
    print("Result:", subtract_twoInt(a1, a2))

Output:

 
Result: 744

Using Function

If we need to write a function to subtract two integers in python, we can do as below –

 
def subtractIntegers(a1, a2):
    return a1 - a2
  
print("Result:", subtractIntegers(15, 28))

Output:

 
Result: -13

That’s how we can write python program to subtract two integers with examples.

Reference: Subtraction

Learn about more python examples at – https://tutorialwing.com/python-tutorial/