# StrictMath signum() Method in Java

1. The signum(double num) is an inbuilt method of StrictMath class in Java which is used to get the signum method of the argument which means:
• The result is zero if the argument is zero.
• The result 1.0 when the argument is greater than zero.
• The result is -1.0 if the argument is less than zero.

Syntax :

`public static double signum(double num)`

Parameters : The method accepts a single parameter num of double type representing the parameter whose signum is to be returned.
Return Value : The method returns signum function of the argument num. It also gives rise to two different results:

• The result is NaN when the first argument is NaN .
• The result is the same as the argument num when num is positive zero or negative zero.

Examples:

```Input: num = 72.88d
Output: 1.0

Input: num = -72.88d
Output: -1.0

Input: num = 0.0d
Output: 0.0
```

Below program illustrates the working of java.lang.StrictMath.signum(double) method.

 `// Java praogram to illustrate the ` `// java.lang.StrictMath.signum(double) ` `import` `java.lang.*; ` ` `  `public` `class` `Geeks { ` ` `  `    ``public` `static` `void` `main(String[] args) ` `    ``{ ` ` `  `        ``double` `num1 = ``46``.82d, num2 = ``0``.0d, num3 = -``0``.0d, num4 = -``18``.2d; ` ` `  `        ``// It returns 1.0 since the argument is greater than zero ` `        ``double` `sig_val = StrictMath.signum(num1); ` `        ``System.out.println(``"Signum Value = "` `+ sig_val); ` ` `  `        ``sig_val = StrictMath.signum(num2); ` `        ``System.out.println(``"Signum Value = "` `+ sig_val); ` ` `  `        ``sig_val = StrictMath.signum(num3); ` `        ``System.out.println(``"Signum Value = "` `+ sig_val); ` ` `  `        ``sig_val = StrictMath.signum(num4); ` `        ``System.out.println(``"Signum Value = "` `+ sig_val); ` `    ``} ` `} `

Output:

```Signum Value = 1.0
Signum Value = 0.0
Signum Value = -0.0
Signum Value = -1.0
```
2. The signum(float num) is an inbuilt method of StrictMath class in Java which is used to get the signum method of the argument which means:
• The result is zero if the argument is zero.
• The result 1.0 when the argument is greater than zero.
• The result is -1.0 if the argument is less than zero.

Syntax :

`public static float signum(float num)`

Parameters : The method accepts a single parameter num of float type representing the parameter whose signum is to be returned.

Return Value : The method returns signum function of the argument num. It also gives rise to two different results:

• The result is NaN when the first argument is NaN .
• The result is the same as the argument num when num is positive zero or negative zero.

Examples:

```Input: num = 11.8f
Output: 1.0

Input: num = -55.88f
Output: -1.0

Input: num = 0.0f
Output: 0.0
```

Below program illustrates the working of java.lang.StrictMath.signum(float) method:

 `// Java praogram to illustrate the ` `// java.lang.StrictMath.signum(float) ` `import` `java.lang.*; ` ` `  `public` `class` `Geeks { ` ` `  `    ``public` `static` `void` `main(String[] args) ` `    ``{ ` ` `  `        ``float` `num1 = ``7``.22f, num2 = ``0``.0f, num3 = -``0``.0f, num4 = -``18``.11f; ` ` `  `        ``// It returns 1.0 since the argument is greater than zero ` `        ``float` `sig_val = StrictMath.signum(num1); ` `        ``System.out.println(``"Signum Value = "` `+ sig_val); ` ` `  `        ``sig_val = StrictMath.signum(num2); ` `        ``System.out.println(``"Signum Value = "` `+ sig_val); ` ` `  `        ``sig_val = StrictMath.signum(num3); ` `        ``System.out.println(``"Signum Value = "` `+ sig_val); ` ` `  `        ``sig_val = StrictMath.signum(num4); ` `        ``System.out.println(``"Signum Value = "` `+ sig_val); ` `    ``} ` `} `

Output:

```Signum Value = 1.0
Signum Value = 0.0
Signum Value = -0.0
Signum Value = -1.0
```

Don’t stop now and take your learning to the next level. Learn all the important concepts of Data Structures and Algorithms with the help of the most trusted course: DSA Self Paced. Become industry ready at a student-friendly price.

My Personal Notes arrow_drop_up Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :
Practice Tags :

Be the First to upvote.

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.