Write a program to print following pattern

1

12

123

1234

12345

Program code

#include <stdio.h>

int main()
{
    int i, j;
    for(i=1;i<=5;i++)
    {
        for(j=1;j<=i;j++)
        {
            printf("%d",j);
        }
        printf("\n");
    }

    return 0;
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

Step by Step solution

  1. Number of row

    Is has 5row , so first loop will execute for 5 time

#include <stdio.h>
int main()

{

    int i, j;

    for(i=1;i<=5;i++)
    
{......
 }



    return 0;

}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
(adsbygoogle = window.adsbygoogle || []).push({});
  1. Number of character

It has only one type of character , so there will be only one nested loop

#include <stdio.h>
int main()

{

......
  for(j=1;j<=i;j++)
        {
            printf("%d",j);
        }
        printf("\n");
}
1
2
3
4
5
6
7
8
9
10
11
12
  1. Number of column

It has 5 maximum column and is decreasing with row number , so the nested loop decrease it's repetation with increase in row

#include <stdio.h>

............
      for(j=1;j<=i;j++)
        {
            printf("%d",j);
        }
        printf("\n");
...................


    return 0;
1
2
3
4
5
6
7
8
9
10
11
12