Java Number Patterns

Question

How do we print,

_ _ _ _1

_ _ _2 1

_ _3 2 1

_ 4 3 2 1

In Java?

Please help, I don't know how to get started

Answer 1

/*user can define number of lines as input*/

import java.util.Scanner;

public class Main {

public static void main (String []args){

Scanner myInput = new Scanner(System.in);

System.out.print( "Enter number of lines: " );

num = myInput.nextInt();

for (int line = 0; line< num; line++) {

for (int dashNum = line; dashNum< num; dashNum++)

print_();

for (int digit = num; digit >= num -line; digit--)

System.out.print(digit);

System.out.println();

}

}

private static void print_ () {

System.out.print("_");

}

}

Answer 2

class PrintPattern

{

public static void main(String args[])

{

int numStart=0;

for (int iLoop=4; iLoop>0; iLoop--)

{

numStart++;

for (int jLoop=0; jLoop<iLoop; jLoop++)

{

System.out.print("_");

if (jLoop<iLoop-1) { System.out.print(" "); } // if you don't want the space between each underscore, then comment out this line

}

for (int jLoop=numStart; jLoop>0; jLoop--)

{

System.out.print(jLoop);

}

System.out.println(" ");

}

}

}