Python Program to Perform Addition

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Given two numbers and the task is to find the addition of two numbers.

Also, given a list and the task is to find the addition of all the elements in a given list.

Examples:

Example1:

Input:

Given first number = 2
Given second number = 3

Output:

The addition of given two numbers { 2 + 3 } =  5

Example2:

Input:

Given List = [4, 7, 3, 1, 5]

Output:

The sum of all the elements of a given list [4, 7, 3, 1, 5] = 
20

Program to Perform Addition in Python

Method #1: Using + Operator (Static Input)

1) Addition using Functions

Approach:

  • Create a function say Additionof_2numbers() which accepts the given two numbers as the arguments and returns the addition of given two numbers.
  • Inside the function, add the given two numbers and store it in a variable.
  • Return the above result.
  • Give the first number as static input and store it in a variable.
  • Give the second number as static input and store it in another variable.
  • Pass the given two numbers as the arguments to the Additionof_2numbers() function and store it in another variable.
  • Print the addition of given two numbers
  • The Exit of the program.

Below is the implementation:

# Create a function say Additionof_2numbers() which accepts the given two numbers
# as the arguments and returns the addition of given two numbers.


def Additionof_2numbers(gvn_num1, gvn_num2):
    # Inside the function, add the given two numbers and store it in a variable.
    rsltsum = gvn_num1 + gvn_num2
    # Return the above result.
    return(rsltsum)

# Give the first number as static input and store it in a variable.
gvn_num1 = 2
# Give the second number as static input and store it in another variable.
gvn_num2 = 3
# Pass the given two numbers as the arguments to the Additionof_2numbers() function 
# and store it in another variable.
fnl_summ = Additionof_2numbers(gvn_num1, gvn_num2)
# Print the addition of given two numbers
print("The addition of given two numbers {",gvn_num1,"+",gvn_num2,"} = ",fnl_summ)

Output:

The addition of given two numbers { 2 + 3 } =  5

2)Addition of list Elements using for loop

Approach:

  • Give the list as static input and store it in a variable.
  • Take a variable and initialize its value to 0.
  • Loop in the given list using the for loop.
  • Add the element of the given list to the above declared rslt_sum variable and store it in the same variable.
  • Print the sum of all the elements of a given list.
  •  The Exit of the program.

Below is the implementation:

# Give the list as static input and store it in a variable.
gvn_lst = [4, 7, 3, 1, 5]
# Take a variable and initialize its value to 0.
rslt_sum = 0
# Loop in the given list using the for loop.
for elemnt in gvn_lst:
    # Add the element of the given list to the above declared rslt_sum variable
        # and store it in the same variable.
    rslt_sum = rslt_sum+elemnt
# Print the sum of all the elements of a given list.
print("The sum of all the elements of a given list", gvn_lst, "= ")
print(rslt_sum)

Output:

The sum of all the elements of a given list [4, 7, 3, 1, 5] = 
20

Method #2: Using + Operator (User Input)

Approach:

  • Create a function say Additionof_2numbers() which accepts the given two numbers as the arguments and returns the addition of the given two numbers.
  • Inside the function, add the given two numbers and store it in a variable.
  • Return the above result.
  • Give the first number as user input using the int(input()) function and store it in a variable.
  • Give the second number as user input using the int(input()) function and store it in another variable.
  • Pass the given two numbers as the arguments to the Additionof_2numbers() function and store it in another variable.
  • Print the addition of two numbers.
  • The Exit of the program.

Below is the implementation:

# Create a function say Additionof_2numbers() which accepts the given two numbers
# as the arguments and returns the addition of given two numbers.


def Additionof_2numbers(gvn_num1, gvn_num2):
    # Inside the function, add the given two numbers and store it in a variable.
    rsltsum = gvn_num1 + gvn_num2
    # Return the above result.
    return(rsltsum)

# Give the first number as user input using the int(input()) fucntion and store it in a variable.
gvn_num1 = int(input("Enter some random number = "))
# Give the second number as user input using the int(input()) fucntion and store it in another variable.
gvn_num2 = int(input("Enter some random number = "))
# Pass the given two numbers as the arguments to the Additionof_2numbers() function 
# and store it in another variable.
fnl_summ = Additionof_2numbers(gvn_num1, gvn_num2)
# Print the addition of given two numbers
print("The addition of given two numbers {",gvn_num1,"+",gvn_num2,"} = ",fnl_summ)

Output:

Enter some random number = 55
Enter some random number = 45
The addition of given two numbers { 55 + 45 } = 100

2)Addition of list Elements using for loop

Approach:

  • Give the list as user input using list(),map(),input(),and split() functions.
  • Store it in a variable.
  • Take a variable and initialize its value to 0.
  • Loop in the given list using the for loop.
  • Add the element of the given list to the above declared rslt_sum variable and store it in the same variable.
  • Print the sum of all the elements of a given list.
  •  The Exit of the program.

Below is the implementation:

# Give the list as user input using list(),map(),input(),and split() functions.
# Store it in a variable.
gvn_lst = list(map(int, input(
   'Enter some random List Elements separated by spaces = ').split()))

# Take a variable and initialize its value to 0.
rslt_sum = 0
# Loop in the given list using the for loop.
for elemnt in gvn_lst:
    # Add the element of the given list to the above declared rslt_sum variable
        # and store it in the same variable.
    rslt_sum = rslt_sum+elemnt
# Print the sum of all the elements of a given list.
print("The sum of all the elements of a given list", gvn_lst, "= ")
print(rslt_sum)

Output:

Enter some random List Elements separated by spaces = 6 7 3 1 2
The sum of all the elements of a given list [6, 7, 3, 1, 2] = 
19