question: static public String numberToString ( Number n ) throws JSONException { if ( n == null ) { throw new JSONException ( "Null pointer" ) ; } testValidity ( n ) ; String s = n . toString ( ) ; if ( s . indexOf ( '.' ) > 0 && s . indexOf ( 'e' ) < 0 && s . indexOf ( 'E' ) < 0 ) { while ( s . endsWith ( "0" ) ) { s = s . substring ( 0 , s . length ( ) - 1 ) ; } if ( s . endsWith ( "." ) ) { s = s . substring ( 0 , s . length ( ) - 1 ) ; } } return s ; }
target:  Produce a string from a number.