# Python program to add two numbers

• Difficulty Level : Basic
• Last Updated : 13 Mar, 2023

Given two numbers num1 and num2. The task is to write a Python program to find the addition of these two numbers.

Examples:

```Input: num1 = 5, num2 = 3
Output: 8

Input: num1 = 13, num2 = 6
Output: 19```

In the below program to add two numbers, the user is first asked to enter two numbers and the input is scanned using the input() function and stored in the variables number1 and number2. Then, the variables number1 and number2 are added using the arithmetic operator + and the result is stored in the variable sum. Below is the Python program to add two numbers:

Example 1:

## Python3

 `# Python3 program to add two numbers`` ` `num1 ``=` `15``num2 ``=` `12`` ` `# Adding two nos``sum` `=` `num1 ``+` `num2`` ` `# printing values``print``(``"Sum of {0} and {1} is {2}"` `.``format``(num1, num2, ``sum``))`

Output:

`Sum of 15 and 12 is 27`

Example 2: Adding two number provided by user input

## Python3

 `# Python3 program to add two numbers`` ` `number1 ``=` `input``(``"First number: "``)``number2 ``=` `input``(``"\nSecond number: "``)`` ` `# Adding two numbers``# User might also enter float numbers``sum` `=` `float``(number1) ``+` `float``(number2)`` ` `# Display the sum``# will print value in float``print``(``"The sum of {0} and {1} is {2}"` `.``format``(number1, number2, ``sum``))`

Output:

```First number: 13.5 Second number: 1.54
The sum of 13.5 and 1.54 is 15.04```

Example 3:

## Python3

 `# Python3 program to add two numbers`` ` `# Driver Code``if` `__name__ ``=``=` `"__main__"` `:``   ` `  ``num1 ``=` `15``  ``num2 ``=` `12``   ` `  ``# Adding two numbers``  ``sum_twoNum ``=` `lambda` `num1, num2 : num1 ``+` `num2``   ` `  ``# printing values``  ``print``(``"Sum of {0} and {1} is {2};"` `.``format``(num1, num2, sum_twoNum(num1, num2)))`

Output:

`Sum of 15 and 12 is 27;`

Example 4: Adding two numbers using by defining add function and return the result

## Python3

 `#To define a function that take two integers and return the sum of those two numbers``def` `add(a,b):``  ``return` `a``+``b`` ` `#initializing the variables``num1 ``=` `10``num2 ``=` `5`` ` `#function calling and store the result into sum_of_twonumbers``sum_of_twonumbers ``=` `add(num1,num2)`` ` `#To print the result``print``(``"Sum of {0} and {1} is {2};"` `.``format``(num1, num2, sum_of_twonumbers))`

Output

`Sum of 10 and 5 is 15;`

Time Complexity : O(1)

Space Complexity : O(1)

Example 5 : Using operator.add() method

Approach

1. Initialize two variables num1,num2
2. Find sum using operator.add() by passing num1,num2 as arguments and assign to su
3.  Display num1,num2 and su

## Python3

 `# Python3 program to add two numbers`` ` `num1 ``=` `15``num2 ``=` `12`` ` `# Adding two nos``import` `operator``su ``=` `operator.add(num1,num2)`` ` `# printing values``print``(``"Sum of {0} and {1} is {2}"` `.``format``(num1, num2, su))`

Output

```Sum of 15 and 12 is 27
```

Time Complexity : O(1)

Auxiliary Space : O(1)

My Personal Notes arrow_drop_up