Driver Code
public static void Main ( ) { string input = " GeeksforGeeks " ; if ( uniqueCharacters ( input ) == true ) Console . WriteLine ( " The ▁ String ▁ " + input + " ▁ has ▁ all ▁ unique ▁ characters " ) ; else Console . WriteLine ( " The ▁ String ▁ " + input + " ▁ has ▁ duplicate ▁ characters " ) ; } }