1 12 123 1234 12345
/**
* C program to print number pattern
* www.atnyla.com
*/
#include <stdio.h>
int main()
{
int i, j, N;
printf("Enter N: ");
scanf("%d", &N);
for(i=1; i<=N; i++)
{
// Logic to print numbers
for(j=1; j<=i; j++)
{
printf("%d", j);
}
printf("\n");
}
return 0;
}Enter N: 5
1
12
123
1234
12345
Basic C programming, Loop
1 12 123 1234 12345
Logic to this pattern is pretty simple; to understand the logic, first have a careful eye on to the pattern for a minute and think the logic. You can observe that there are N number of rows (where N is the total number of rows to be printed). Each row exactly contains i number of columns (where i is the current row number). And for each row in each column j gets printed (where j is the current column number).
The step-by-step descriptive logic is:
Lets implement this logic.
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.