Printing *s as triangles in Java?

Question

My assignment in my Java course is to make 3 triangles. One left aligned, one right aligned, and one centered. I have to make a menu for what type of triangle and then input

Answer 1

public static void main(String[] args) {

    System.out.print("Enter the number: ");
    Scanner userInput = new Scanner(System.in);
    int myNum = userInput.nextInt();
    userInput.close();

    System.out.println("Centered Triange");
    for (int i = 1; i <= myNum; i+=1) {//This tells how many lines to print (height)

        for (int k = 0; k < (myNum-i); k+=1) {//Prints spaces before the '*'
            System.out.print(" ");
        }

        for (int j = 0; j < i; j++) { //Prints a " " followed by '*'.   
            System.out.print(" *");
        }

        System.out.println(""); //Next Line     
    }

    System.out.println("Left Triange");
    for (int i = 1; i <= myNum; i+=1) {//This tells how many lines to print (height)

        for (int j = 0; j < i; j++) { //Prints the '*' first in each line then spaces.  
            System.out.print("* ");
        }

        System.out.println(""); //Next Line         
    }

    System.out.println("Right Triange");
    for (int i = 1; i <= myNum; i+=1) {//This tells how many lines to print (height)

        for (int k = 0; k < (myNum-i); k+=1) {//Prints spaces before the '*'
            System.out.print("  ");
        }

        for (int j = 0; j < i; j+=1) { //Prints the " " first in each line then a "*".  
            System.out.print(" *");
        }

        System.out.println(""); //Next Line         
    }

}