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

Getting Started

The task is to add one integer with another integer number in python. For example,

If a = 2 and b = 5, then output is 2 + 5 = 7.

We can do so in multiple ways –

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

Simple Approach

We can multiply two integers in python using multiplication operator (i.e. * operator) as shown below –

 
n1 = 15
n2 = 6
 
result = n1 * n2  # Get product of two integers using * operator 
print("Result:", result)

Output:

 
Result: 90

Using User Input

If we want to take two integers as input from user and then multiply it, we can do so as shown below –

• We can read input from console using input() function.
• Then, type cast read value into integer using int.
• Multiply using multiplication operator (i.e. * operator).

 
n1 = int(input("Enter a number"))
n2 = int(input("Enter another number"))
 
result = n1 * n2
print("Product of {0} and {1} is {2}" .format(n1, n2, result))

Output:

 
Enter a number
23
Enter another number
6
Product of 23 and 6 is 138

Using User Input (Command Line Arguments)

Till now, we have seen how to accept value from user using terminal. Now, we will see how to read value using command line arguments.

• Method 1

  • sys.argv is used to read input as command line arguments. It is present in sys module in python.
  • Then, we type cast read value into integer using int.
  • After that, multiply both values and print it using print() function.

   
  import sys
  n1, n2 = sys.argv[1:3]
  print("Result:", int(n1) * int(n2))
  

  Output:

   
  Result: 138
  

  Run above code with command line arguments as 23 and 6.

  n1, n2 = sys.argv[1:3] reads two values from console and store it in variable n1 and n2.

• Method 2

  If we don’t want to restrict number of items to be read from command line arguments, we can omit second parameter from sys.argv[1:3] as shown below –

   
  import sys
  n1, n2 = sys.argv[1:]
  print("Result:", int(n1) * int(n2))
  

  Output:

   
  Result: 138
  

  Run above code with command line arguments as 23 and 6.

Using Lambda

Using lambda and multiplication operator (* operator), we can multiply two integers as shown below –

 
if __name__ == "__main__" :
    n1 = 17
    n2 = 24
 
    # Multiply two integers
    multiply_twoNum = lambda n1, n2 : n1 * n2
    print("Result:", multiply_twoNum(n1, n2))

Output:

 
Result: 408

Using Function

Below code contains a function multiplyIntegers that wraps logic to multiply two integers in python –

 
def multiplyIntegers(n1, n2):
    return n1 * n2
  
print("Result:", multiplyIntegers(15, 28))

Output:

 
Result: 420

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

Reference: Multiplication

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