Write a program, which creates an array of 15 elements of type integer and initializes each of the elements with a value equals to the index of the element multiplied by 3. Print the elements of the array.

C++

Write a Java application for a grade book using arrays: Create an array to store 20 test grades, random numbers between 0-100, inclusive.  Print these 20 grades Calculate and print the average grade Calculate and print the highest and lowest grades Complete BMI arrays template BMI.java   Use two int arrays to store n numbers from user input, called height[] and weight[].  "The BMI is defined as the body mass divided by the square of the body height" Calculate BMIs and store values into a double array called bmi[].    Write a method to print an array, use an enhanced for loop in the print method.  Print the BMIs by invoking the print method.  import java.util.Scanner;public class BMI{public static void main(String[] args){Scanner key = new Scanner (System.in);int num = // use Scanner object to get an integer// declare an int array for heightint[] height = new int[num];// declare an int array for weight below...// declare an array for BMI array...for ( ){ // iterate all array…

Program: Using a multidimensional array, create a triangular-shaped array. You will ask the user how many lines they want to see and then create the array, fill it, and then print it. You will fill the array with one 1 in the first row, two 2’s in the second row, etc. This should work for any integer that the user enters. (Just because I am starting on 1 does not mean row 0 was skipped.)   You must: use a loop to create the array shape. You must: use nested for loops to fill the array and to print the values back to the screen. Your program should print as shown below.   Example Output:   How many lines would you like in your triangle? >>>9 1 2 2 3 3 3 4 4 4 4 5 5 5 5 5 6 6 6 6 6 6 7 7 7 7 7 7 7 8 8 8 8 8 8 8 8 9 9 9 9 9 9 9 9 9   If your code looks like the code below, it is not what I’m asking for. The code below is making a square multidimensional array, not a triangular one. The code below is just leaving certain spots empty so that it looks like a triangle. I will ask you…