Print number triangle pattern - C Program

Write a C program to generate the following pattern for n lines:

number triangle

Solution:

For printing the above pattern, first print top 4 lines and then print last 3 lines.

#include<stdio.h>
int main()
{
      int i,j;
      for(i=1;i<=4;i++)          // This loop prints top 4 lines.
      {
            for(j=1;j<=i;j++)
            {
                  printf("%d\t",j);
            }
            printf("\n");
      }
      for(i=3;i>=1;i--) // This loop prints last 3 lines
      {
            for(j=1;j<=i;j++)
            {
                  printf("%d\t",j);       // \t gives the tab between numbers.
            }
            printf("\n");
      }
      return 0;
}


Output:

number triangle
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