Use of replace() in Python language

replace() function in python is used for replace the charecter or a set of charecter(called string) with other chracter or set of character of a specified string.

basic Syntax

<string variable name>.replace(<old string>,<new string>)

Example 1

Write a Python program to get a string from a given string where all occurrences of its first char have been changed to '#'.
Sample String : 'array'
Expected Result : '#rr#y'

str1=input("Enter A string : ")
char = str1[0]
str1 = str1.replace(char, '$')
print(str1)

Example 2

Write a Python program to get a string from a given string where all occurrences of its first char have been changed to '#', except the first char itself.
Sample String : 'array'
Expected Result : 'arr#y'

str1=input("Enter A string : ")
char = str1[0]
str1 = str1.replace(char, '$')
str1 = char + str1[1:]
print(str1)