Write a Python program to get a string from a given string where all occurrences of its first char have

Q. 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 : 'restart'
Expected Result : 'resta$t'

Answer =

def change_char (str1) :
    char = str1[0]
    str1 = str1.replace (char, '$')
    str1 = char + str1 [1 : ]
    return str1

print (change_char ('restart'))