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Python String | replace()
  • Difficulty Level : Basic
  • Last Updated : 22 Apr, 2021

replace() is an inbuilt function in Python programming language that returns a copy of the string where all occurrences of a substring is replaced with another substring.

Syntax :

string.replace(old, new, count)

Parameters :

old – old substring you want to replace.
new – new substring which would replace the old substring.

count – the number of times you want to replace the old substring with the new substring. (Optional )



Return Value :
It returns a copy of the string where all occurrences of a substring is replaced with another substring.

Note:

  • If count is not specified then all the occurences of old substring is replaced with the new substring.
  • This method returns the copy of the string i.e. it does not changes the original string.

Below is the code demonstrating replace() :

Example 1:




# Python3 program to demonstrate the 
# use of replace() method  
  
string = "geeks for geeks geeks geeks geeks" 
   
# Prints the string by replacing all
# geeks by Geeks 
print(string.replace("geeks", "Geeks")) 
  
# Prints the string by replacing only
# 3 occurrence of Geeks  
print(string.replace("geeks", "GeeksforGeeks", 3))

Output :

Geeks for Geeks Geeks Geeks Geeks
GeeksforGeeks for GeeksforGeeks GeeksforGeeks geeks geeks

Example 2:




# Python3 program to demonstrate the
# use of replace() method
  
string = "geeks for geeks geeks geeks geeks"
  
# Prints the string by replacing
# e by o
print(string.replace("e", "o"))
  
# Prints the string by replacing only
# 3 occurrence of ek by o
print(string.replace("ek", "o", 3))

Output:

gooks for gooks gooks gooks gooks
geos for geos geos geeks geeks

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