Generate Random Number Using Math.Random Function in JAVA

Here is Program to Get a Random Number between 0 to Passed Argument

public class RandomInt { 
    public static void main(String[] args) { 
        int N = Integer.parseInt(args[0]);

        // a pseudo-random real between 0.0 and 1.0
        double r = Math.random(); 

        // a pseudo-random integer between 0 and N-1
        int n = (int) (r * N);

        System.out.println("Your random integer is: " + n);
    }
}

/*************************************
 *  % java RandomInt 100
 *  Your random integer is: 55
 *
 *  % java RandomInt 100
 *  Your random integer is: 3
 *
 *************************************/

Explanation of Random Number Program:
In this Java Random Program, we have one argument for number and then we are generating random number using Math.random() function.

Math.random() function always generate the value between 0 to 1 so if you want to generate the value different than this then you should multiply your number to Random Generated Value.

 After multiplying the number with Generated Random number we will get the our Random Number.