Python: Add a number to each element in a given list of numbers

Last update on April 19 2025 12:58:24 (UTC/GMT +8 hours)

Add Number to Each Element in List

Write a Python program to add a number to each element in a given list of numbers.

Visual Presentation:

Sample Solution:

Python Code:

# Define a function called 'add_val_to_list' that adds a value 'add_val' to each element in a list 'lst'.
def add_val_to_list(lst, add_val):
    # Create a new list 'result' as a reference to the input list 'lst'.
    result = lst
    # Use a list comprehension to add 'add_val' to each element in 'result' and create a new list.
    result = [x + add_val for x in result]
    return result

# Create a list 'nums' containing integer values.
nums = [3, 8, 9, 4, 5, 0, 5, 0, 3]

# Print a message indicating the original list.
print("Original list:")
print(nums)

# Set the value 'add_val' to 3 and print a message indicating the intention to add 'add_val' to each element in the list.
add_val = 3
print("\nAdd", add_val, "to each element in the said list:")

# Call the 'add_val_to_list' function to add 3 to each element in the list 'nums' and print the result.
print(add_val_to_list(nums, add_val))

# Create a list 'nums' containing float values.
nums = [3.2, 8, 9.9, 4.2, 5, 0.1, 5, 3.11, 0]

# Print a message indicating the original list.
print("\nOriginal list:")
print(nums)

# Set the value 'add_val' to 0.51 and print a message indicating the intention to add 'add_val' to each element in the list.
add_val = 0.51
print("\nAdd", add_val, "to each element in the said list:")

# Call the 'add_val_to_list' function to add 0.51 to each element in the list 'nums' and print the result.
print(add_val_to_list(nums, add_val)) 

Sample Output:

Original lists:
[3, 8, 9, 4, 5, 0, 5, 0, 3]

Add 3 to each element in the said list:
[6, 11, 12, 7, 8, 3, 8, 3, 6]

Original lists:
[3.2, 8, 9.9, 4.2, 5, 0.1, 5, 3.11, 0]

Add 0.51 to each element in the said list:
[3.71, 8.51, 10.41, 4.71, 5.51, 0.61, 5.51, 3.62, 0.51]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to add a given number to each element in a list only if the element is a prime number.
• Write a Python program to add a different number to each element based on its index (e.g., index 0 gets +1, index 1 gets +2, etc.).
• Write a Python program to add a number to each element and then square each resulting value.
• Write a Python program to add a number to each element but skip elements that are negative.

Python Code Editor:

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