what does math.random do in java code example

Example 1: java random number

import java.util.Random;

Random rand = new Random();

// Obtain a number between [0 - 49].
int n = rand.nextInt(50);

// Add 1 to the result to get a number from the required range
// (i.e., [1 - 50]).
n += 1;

Example 2: java math.random

int rand = (int)(Math.random() * range) + min;

Example 3: math.random java

// int rand = (int)(Math.random() * range) + min; 
// Java program to demonstrate Math.random() working 
// of java.lang.Math.random() method 
import 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); 
        } 
    } 
}