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 positive number so the method returns 1 Input: -5482549 Output: -1
Below program illustrate the signum() method of BigInteger.
Java
// Program Demonstrate signum() method of BigIntegerimport 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
Reference:https://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html#signum()
