Java Number pattern 13 program using For loop

Write "Java"  program to print below Number Pattern 13:


To understand this example, you should have knowledge of the following topics:

·  Java For loop
·   Java programming operators.

Java Number pattern 13 program using For loop:
class numberPattern13
{
public static void main(String[] ags)
{
    int i, j,k;
    for(i=5;i>=1;i--)
    {
        if(i%2==1) k=1;
        else k=i;
        for(j=1;j<=i;j++)
        {
            System.out.print(k);
            if(i%2==1) k++;
            else k--;
        }
        System.out.println();
    }
  }
}
Output:
12345
4321
123
21
1
Explanation:
  • First three integers "i", "j" and "k" are declared of type int.
  • Then in the First for loop “i” value is initialized with a value 5.
  • Now “i” value is checked with the condition i >= 1 that is (5 >= 1). So the condition is True.
  • Now the loop checks the if condition if the condition is True then loop enters into second for loop.
  • Now the loop enters into second for loop and checks the condition j <= i. Where "j = 1". and print the value of "k".
  • And check the if condition and continues up to program terminate.
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