Write a C program to print the given number pattern series. How to print the given number pattern series using for loop in C programming. Logic to print the given number pattern in C program.

## Required knowledge

## Logic to print the given number pattern

If at first the pattern seems confusing. Take your time and have a closer look to the pattern for a minute. You might find below things about the pattern.

- It contains of total N rows (where N is the total number of rows to be printed).
- To make things easier you can divide the pattern in two parts.
- Now, when you look to the first part of the pattern, you will find that it starts from 3
^{rd}row and goes till 5^{th}row. Hence the inner loop formation to print this part will be something like for(j=3; j<=i; j++). - The second pattern is an odd pattern, whose first column starts with an odd number. I have already explained the logic to print this pattern in one of my previous post.

It contains total N rows and each row contains exactly i columns (where i is the current row number. Each column start with a value (i * 2) - 1. Hence the second inner loop formation for this part will be for(j=(i * 2)-1; j>=i; j--).

Lets, code down the logic.

## Program to print the given pattern

```
/**
* C program to print the given number pattern
*/
#include <stdio.h>
int main()
{
int i, j, value, N;
printf("Enter rows: ");
scanf("%d", &N);
for(i=1; i<=N; i++)
{
value = i + 1;
// Prints the first part of pattern
for(j=3; j<=i; j++)
{
printf("%d ", value);
value++;
}
// Prints the second part of pattern
for(j=(i*2)-1; j>=i; j--)
{
printf("%d ", j);
}
printf("\n");
}
return 0;
}
```

Output

Enter rows: 5 1 3 2 4 5 4 3 5 6 7 6 5 4 6 7 8 9 8 7 6 5

Happy coding 😉

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