绝对值函数使用说明
绝对值函数是JDK中Math.java中的实现方法,其用来得到表达式的绝对值。
其实现非常简单,源码如下:
/** * 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; }
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