Print Star( * ) Patterns

Thursday, 29 May 2014

Print Star( * ) Patterns

Here are some tricks to print * pattern

If you can print pattern like this then you are genius

NOTE : Now all you need to print any other pattern is just satisfy a condition before printing *

Java code to generate above pattern is given below.

save it with name Pattern.java

package com.trickyjava.pattern;

public class Pattern {

 public static void main(String[] args) {
  for (int i = 1; i <= 5; i++) {
   for (int j = 1; j <= 5; j++) {
    System.out.print(" * ");
   }
   System.out.println();
  }
 }

}

In above pattern first loop for (int i = 1; i <= 5; i++) used for rows
and second loop for (int j = 1; j <= 5; j++) is used for columns

Now if we want to print pattern like this

for this we need to put a condition before printing *

So now we will learn how to make condition to print pattern

Here is explanation for the above pattern

NOTE : we will make condition based on ( j + i ) and ( j - i ) for any pattern.

Now java code to print the above pattern is

package com.trickyjava.pattern;

public class Pattern {

 public static void main(String[] args) {
  for (int i = 1; i <= 5; i++) {
   for (int j = 1; j <= 5; j++) {
    if (i + j <= 6) {             
     System.out.print(" * ");
    } else {                        
     System.out.print("   ");
    }                               
   }
   System.out.println();
  }
 }

}