Driver prohram to test above function
string = " geeksforgeeks " NEW_LINE index = firstNonRepeating ( string ) NEW_LINE if index == 10 ** 18 : NEW_LINE INDENT print ( " Either ▁ all ▁ characters ▁ are ▁ repeating ▁ or ▁ string ▁ is ▁ empty " ) NEW_LINE DEDENT else : NEW_LINE INDENT print ( " First ▁ non - repeating ▁ character ▁ is " , string [ index ] ) NEW_LINE DEDENT