comefrom: <awangdev>405. Convert a Number to Hexadecimal_1.java
code: private String convert(int digit) {
  
          if (digit <= 9) return String.valueOf((char)(digit + '0'));
          return String.valueOf((char)(digit - 10 + 'a'));
      }
masked: private String var_0 ( int var_1 ) {
    if ( var_1 <= 9 ) return String . valueOf ( ( char ) ( var_1 + '0' ) ) ;
    return String . valueOf ( ( char ) ( var_1 - 10 + 'a' ) ) ;
  }
  