If single digit number
if ( len == 1 ) { word += single_digits [ num [ 0 ] - '0' ] ; return word ; } int i = 0 , ctr = 0 ; string s = " ▁ " ; while ( i < len ) { if ( len >= 3 ) { if ( num [ i ] != '0' ) { word += single_digits_temp [ num [ i ] - '0' ] + " ▁ " ;