C Number pattern 13 program with Explanation

Write "C"  program to print below Number pattern 13:

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

·     C if Else

·     C For loop

·     C programming operators

C Number pattern 13 program using For loop:

#include <stdio.h>

int main()
{
    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++)
        {
            printf("%d",k);
            if(i%2==1) k++;
            else k--;
        }
        printf("\n");
    }
    return 0;
}

Output:

12345

4321

123

21

1

Explanation:

• The 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 the loop enters into second for loop.
• Now the loop enters into the 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 termination.

See Also: C Number pattern 12 program C Number pattern 14 program

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