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Math. Usage of random()

2022-07-21 15:20:00 【Black and white impure】

Math.random()  Function returns a floating point number ,  Pseudo random numbers in the range from 0 To Less than 1, in other words , from 0（ Include 0） Upward , But not including 1（ exclude 1）.

public class Text2 {
    public static void main(String[] args) {
        System.out.println(Math.random());
    }
}

 Math.random()  take [num1,num2) Between int The format of type random number is :

int random= (int)(Math.random()*(num2-num1)+num1) 

example : take [10,49) Data between 

public class Text2 {
    public static void main(String[] args) {
        int random= (int)(Math.random()*(49-10)+10);
        System.out.println(random);
    }
}

 

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