科特林 |带有示例的 Math.abs() 方法

Math.abs()函数返回给定参数的绝对值。如果参数为非负数，则返回参数本身。而如果参数为负，则返回它的否定值。基本上，它在数学中用作模函数。

Syntax : fun abs(x : DataType) : DataType

Parameters: It can take values of Data type int, double, long, float.

Returns: It returns absolute value of the argument, without changing the data type.

Exceptions:

• If the argument is NaN, the result is NaN.
• If the argument is Int.MIN_VALUE, the result is that same value, Int.MIN_VALUE, which is negative.
• If the argument is Long.MIN_VALUE, the result if that same value, Long.MIN_VALUE, which is negative.

代码 #1：将浮点和双精度数据类型作为参数。

// Kotlin program to illustrate
// working of Math.abs() method 
import kotlin.math.abs
  
fun main(args : Array){
  
    val f = -45.23f;
    val d = 999.32;
    
    // abs() function taking float as input
    println(abs(f));
  
    // abs() function taking double as input
    println(abs(d));
}

输出：

45.23
999.32

代码 #2：将 int 和 long 数据类型作为参数。

// Kotlin program to illustrate
// working of Math.abs() method 
import kotlin.math.abs
  
fun main(args : Array){
  
    val i = -0;
    val l = -69973688;
    
    // abs() function taking int as input
    println(abs(i));
    println(abs(Int.MIN_VALUE));
  
    // abs() function taking long as input
    println(abs(l));
    println(abs(Long.MIN_VALUE));
}

输出：

0
-2147483648

69973688
-9223372036854775808