C#| Math.Abs()方法|套装– 1
在C#中, Abs()是Math类方法,用于返回指定数字的绝对值。通过将不同类型的参数传递给此方法,可以使其过载。重载列表中共有7种方法。
- Math.Abs(十进制)
- Math.Abs(Double)
- Math.Abs(Int16)
- Math.Abs(Int32)
- Math.Abs(Int64)
- Math.Abs(SByte)
- Math.Abs(Single)
Math.Abs(Int64)
此方法用于返回64位带符号整数的绝对值。
句法:
public static long Abs (long val);
范围:
val: It is the required number which is greater than Int64.MinValue, but less than or equal to Int64.MaxValue of type System.Int64.
返回类型:返回一个64位有符号整数,表示r ,使得0≤r≤Int64.MaxValue 。
异常:如果val的值等于Int64.MinValue,则此方法将提供OverflowException 。
例子:
// C# Program to illustrate the // Math.Abs(Int64) Method using System; class Geeks { // Main Method public static void Main() { // Taking long values long[] val = {Int64.MaxValue, 78345482, -4687985, 0}; // using foreach loop foreach(long value in val) // Displaying the result Console.WriteLine("Absolute value of {0} = {1}", value, Math.Abs(value)); } }
输出:
Absolute value of 9223372036854775807 = 9223372036854775807 Absolute value of 78345482 = 78345482 Absolute value of -4687985 = 4687985 Absolute value of 0 = 0
Math.Abs(SByte)
此方法用于返回8位带符号整数的绝对值。
句法:
public static sbyte Abs (sbyte val);
范围:
val: It is the required number which is greater than SByte.MinValue, but less than or equal to SByte.MaxValue of type System.SByte.
返回类型:返回一个8位带符号整数,表示r ,使得0≤r≤SByte.MaxValue 。
异常:如果val的值等于SByte.MinValue,则此方法将给出OverflowException 。
例子:
// C# Program to illlustrate the // Math.Abs(SByte) Method using System; class Geeks { // Main Method public static void Main() { // Taking SByte values sbyte[] sb = {SByte.MaxValue, 45, -41, 0}; // using foreach loop foreach(sbyte value in sb) // Displaying the result Console.WriteLine("Absolute value of {0} = {1}", value, Math.Abs(value)); } }
输出:
Absolute value of 127 = 127 Absolute value of 45 = 45 Absolute value of -41 = 41 Absolute value of 0 = 0
Math.Abs(Single)
此方法用于返回单精度浮点数的绝对值。
句法:
public static float Abs (float val);
范围:
val: It is the required number which is greater than or equal to Single.MinValue, but less than or equal to MaxValue of type System.Single.
返回类型:返回一个单精度浮点数,例如r ,即0≤r≤Single.MaxValue 。
笔记:
- 如果val等于NegativeInfinity或PositiveInfinity ,则返回值将为PositiveInfinity 。
- 如果val等于NaN,则返回值为NaN 。
例子:
// C# Program to illlustrate the // Math.Abs(Single) Method using System; class Geeks { // Main Method public static void Main() { float nan = float.NaN; // Taking float values float[] fl = {float.MinValue, 127.58f, 0.000f, 7556.48e10f, nan, float.MaxValue}; // using foreach loop foreach(float value in fl) // Displaying the result Console.WriteLine("Absolute value of {0} = {1}", value, Math.Abs(value)); } }
输出:
Absolute value of -3.402823E+38 = 3.402823E+38 Absolute value of 127.58 = 127.58 Absolute value of 0 = 0 Absolute value of 7.55648E+13 = 7.55648E+13 Absolute value of NaN = NaN Absolute value of 3.402823E+38 = 3.402823E+38
参考: https://docs.microsoft.com/zh-cn/dotnet/api/system.math.abs?view=netframework-4.7.2