Java Math random() method with Examples
The java.lang.Math.random() method returns a pseudorandom double type number greater than or equal to 0.0 and less than 1.0. . When this method is first called, it creates a single new pseudorandom-number generator,
exactly as if by the expression new java.util.Random.
Syntax :
public static double random() Return : This method returns a pseudorandom double greater than or equal to 0.0 and less than 1.0.
Example 1 :To show working of java.lang.Math.random() method.
// Java program to demonstrate working// of java.lang.Math.random() methodimport java.lang.Math; class Gfg1 { // driver code public static void main(String args[]) { // Generate random number double rand = Math.random(); // Output is different everytime this code is executed System.out.println("Random Number:" + rand); }} |
Output:
0.5568515217910215
Example 2 :To show working of java.lang.Math.random() method.
// Java program to demonstrate working// of java.lang.Math.random() methodimport java.lang.Math; class Gfg2 { // driver code public static void main(String args[]) { // define the range int max = 10; int min = 1; int range = max - min + 1; // generate random numbers within 1 to 10 for (int i = 0; i < 10; i++) { int rand = (int)(Math.random() * range) + min; // Output is different everytime this code is executed System.out.println(rand); } }} |
Output:
6 8 10 10 5 3 6 10 4 2
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