絕對值函數使用說明
絕對值函數是JDK中Math.java中的實現方法，其用來得到表達式的絕對值。
其實現非常簡單，源碼如下：
/**
* Returns the absolute value of an {@code int} value.
* If the argument is not negative, the argument is returned.
* If the argument is negative, the negation of the argument is returned.
*
* <p>Note that if the argument is equal to the value of
* {@link Integer#MIN_VALUE}, the most negative representable
* {@code int} value, the result is that same value, which is
* negative.
*
* @param a the argument whose absolute value is to be determined
* @return the absolute value of the argument.
*/
public static int abs(int a) {
return (a < 0) ? -a : a;
}
申請創業報道，分享創業好點子。點擊此處，共同探討創業新機遇！
