question: public static float ulp ( final float value ) { if ( USE_JDK_MATH ) { return Math . ulp ( value ) ; } final int exponent = getExponent ( value ) ; if ( exponent >= MIN_FLOAT_NORMAL_EXPONENT + 23 ) { if ( exponent == MAX_FLOAT_EXPONENT + 1 ) { return Math . abs ( value ) ; } return Float . intBitsToFloat ( exponent + MAX_FLOAT_EXPONENT - 23 << 23 ) ; } else { if ( exponent == MIN_FLOAT_NORMAL_EXPONENT - 1 ) { return Float . MIN_VALUE ; } return Float . intBitsToFloat ( 1 << exponent - MIN_FLOAT_NORMAL_EXPONENT ) ; } }
target:  The ULP (Unit in the Last Place) is the distance to the next value larger in magnitude.