In this shot, we'll see how to generate a random number in given range. Let's have a look at its syntax.
startRange + (int) (Math.random() * ((endRange - startRange) + 1))
startRange: This is the starting point of the specified range.endRange: This is the end point of the specified range.Math.random(): This is used to generate a random value.(int): This typecasts the value we get from the product of the random number generated by Math.random() and the difference of the starting range and ending range plus one. So, if the value returned is a float or double value, it will convert it to an integer immediately.The value returned is an integer value that is between startRange and endRange.
class HelloWorld {public static void main( String args[] ) {// create some start rangesint startRange1 = 5;int startRange2 = 1;int startRange3 = 0;// create some end rangesint endRange1 = 50;int endRange2 = 10;int endRange3 = 3;// get the random between some rangesint rand1 = startRange1 + (int) (Math.random() * ((endRange1 - startRange1) + 1));int rand2 = startRange2 + (int) (Math.random() * ((endRange2 - startRange2) + 1));int rand3 = startRange3 + (int) (Math.random() * ((endRange3 - startRange3) + 1));// print the resultsSystem.out.println("A Random number between "+startRange1+" and "+endRange1+" is " +rand1);System.out.println("A Random number between "+startRange2+" and "+endRange2+" is " +rand2);System.out.println("A Random number between "+startRange3+" and "+endRange3+" is " +rand3);}}