# BigInteger signum() Method in Java

prerequisite : BigInteger Basics
The java.math.BigInteger.signum() method helps us to identify whether a BigInteger is positive or zero or negative. It returns one of the following values depending on the following conditions:

• returns -1 when number is negative
• returns 0 when number is zero
• returns +1 when number is positive

Syntax:

`public int signum()`

Parameters: The method does not take any parameters.

Return Value: The method returns -1, 0 or 1 as the value of this BigInteger when they are negative, zero or positive respectively.

Examples:

```Input: 2300
Output: 1
Explanation: 2300 is postive number
so the method returns 1

Input: -5482549
Output: -1
```

Below program illustrate the signum() method of BigInteger.

 `// Program Demonstrate signum() method of BigInteger  ` ` `  `import` `java.math.*; ` ` `  `public` `class` `GFG { ` ` `  `    ``public` `static` `void` `main(String[] args) ` `    ``{ ` `        ``// Creating BigInteger object ` `        ``BigInteger biginteger = ``new` `BigInteger(``"2300"``); ` ` `  `        ``// Call signum() method on bigInteger ` `        ``// store the return value as int ` `        ``int` `sigvalue = biginteger.signum(); ` ` `  `        ``// Depending upon sign value find sign of biginteger ` `        ``String sign = ``null``; ` `        ``if` `(sigvalue == ``0``) ` `            ``sign = ``"zero"``; ` `        ``else` `if` `(sigvalue == ``1``) ` `            ``sign = ``"positive"``; ` `        ``else` `            ``sign = ``"negative"``; ` ` `  `        ``// Defining result ` `        ``String result = ``"BigInteger "` `+ biginteger + ``" is "` `+  ` `        ``sign + ``" and Sing value is "` `+ sigvalue; ` ` `  `        ``// Print result ` `        ``System.out.println(result); ` `    ``} ` `} `

Output:

```BigInteger 2300 is positive and Sing value is 1
```

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