1
23
345
4567
56789
/**
* C program to print number pattern
*/
#include <stdio.h>
int main()
{
int i, j, k, N;
printf("Enter N: ");
scanf("%d", &N);
for(i=1; i<=N; i++)
{
k = i;
// Logic to print spaces
for(j=i; j<N; j++)
{
printf(" ");
}
// Logic to print numbers
for(j=1; j<=i; j++, k++)
{
printf("%d", k);
}
printf("\n");
}
return 0;
} 1
23
345
4567
56789
----1 ---23 --345 -4567 56789
If you look to the pattern you will notice that the pattern is similar to the pattern we just did except the trailing spaces. The logic to print the given pattern would be similar as the previous pattern we just did. We only need to add the logic of printing spaces before the number gets printed. If you can notice, there are N - ispaces per row (where i is the current row number).
Step-by-step description to print spaces:
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.