substitute in python code example

Example 1: python replace char in string

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

Example 2: replace() python

#our text
text='Hello there how may I help you!'
     #replacing ("THIS" with "THIS") 
replaced_text=text.replace("!", "?")
print(replaced_text)
#output
"Hello there how may I help you?"

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Java Example