Write a function that replaces all spaces in a string with underscores (_).

 

def replace_spaces(s):

    return s.replace(" ", "_")  

print(replace_spaces("Hello World"))       

print(replace_spaces("Python is fun"))     

print(replace_spaces("NoSpacesHere"))      

#source code --> clcoding.com 

Code Explanation:

Define the function

def replace_spaces(s): → Creates a function replace_spaces that takes a string s as input.

Replace spaces using .replace()

s.replace(" ", "_") → Finds all spaces " " in the string and replaces them with underscores "_".

Return the modified string

The function returns the updated string with all spaces replaced.

Call the function and print results

replace_spaces("Hello World") → Returns "Hello_World".

replace_spaces("Python is fun") → Returns "Python_is_fun".

replace_spaces("NoSpacesHere") → Returns "NoSpacesHere" (unchanged, as there were no spaces).