C# | Math.Sign() Method

In C#, Sign() is a math class method which returns an integer that specify the sign of the number. This method can be overloaded by changing the data type of the passed arguments as follows:

• Math.Sign(Decimal): Returns the integer that specifies the sign of a decimal number.
• Math.Sign(Double): Returns the integer that specifies the sign of a double-precision floating-point number.
• Math.Sign(Int16): Returns the integer that specifies the sign of a 16-bit signed integer. Here Int16 is short data type
• Math.Sign(Int32): Returns the integer that specifies the sign of a 32-bit signed integer. Here Int32 is int data type.
• Math.Sign(Int64): Returns the integer that specifies the sign of a 64-bit signed integer. Here Int64 is long data type.
• Math.Sign(SByte): Returns the integer that specifies the sign of an 8-bit signed integer.
• Math.Sign(Single): Returns the integer that specifies the sign of a single-precision floating-point number. Here single is float data type.

Common Syntax for all above methods:

public static int Sign(data_type value)

Parameter: This method takes a single parameter in the form of either bytes, int, double, sbyte, etc.

Return type : This method returns the value of type System.Int32 as per following mentioned conditions:

Return Value	Condition:
0	If value is equal to zero
1	If value is greater than zero
-1	If value is lesser than zero

Example:

// C# program to demonstrate the
// Math.Sign() method
using System;

class GFG {

    // Main Method
    static void Main(string[] args)
    {

        // Decimal data type
        Decimal de = 150M;

        // Double data type
        Double d = 34.5432d;

        // Int16 data type
        short sh = 0;

        // Int32 data type
        int i = -5678;

        // Int64 data type
        long l = 598964564;

        // SByte data type
        sbyte sb = -34;

        // float data type
        float f = 56.89f;


        // displaying result
        Console.WriteLine("Decimal: " + de + " " + check(Math.Sign(de)));
        Console.WriteLine("Double: " + d + " " + check(Math.Sign(d)));
        Console.WriteLine("Int16: " + sh + " " + check(Math.Sign(sh)));
        Console.WriteLine("Int32: " + i + " " + check(Math.Sign(i)));
        Console.WriteLine("Int64: " + l + " " + check(Math.Sign(l)));
        Console.WriteLine("SByte: " + sb + " " + check(Math.Sign(sb)));
        Console.WriteLine("Single: " + f + " " + check(Math.Sign(f)));

    }

    // function to check whether the input
    // number is greater than zero or not
    public static String check(int compare)
    {
        if (compare == 0)
            return "equal to zero";

        else if (compare < 0)
            return "less than zero";

        else
            return "greater than zero";
    }
}

Output:

Decimal: 150 greater than zero
Double: 34.5432 greater than zero
Int16: 0 equal to zero
Int32: -5678 less than zero
Int64: 598964564 greater than zero
SByte: -34 less than zero
Single: 56.89 greater than zero