Finding absolute value of a number without using Math.abs()

Question

Is there any way to find the absolute value of a number without using the Math.abs() method in java.

Answer 1

If you look inside Math.abs you can probably find the best answer:

Eg, for floats:

    /*      * Returns the absolute value of a {@code float} value.      * If the argument is not negative, the argument is returned.      * If the argument is negative, the negation of the argument is returned.      * Special cases:      * <ul><li>If the argument is positive zero or negative zero, the      * result is positive zero.      * <li>If the argument is infinite, the result is positive infinity.      * <li>If the argument is NaN, the result is NaN.</ul>      * In other words, the result is the same as the value of the expression:      * <p>{@code Float.intBitsToFloat(0x7fffffff & Float.floatToIntBits(a))}      *      * @param   a   the argument whose absolute value is to be determined      * @return  the absolute value of the argument.      */     public static float abs(float a) {         return (a <= 0.0F) ? 0.0F - a : a;     }