Number Patterns Example 31 – C Program

Number Patterns Example 31 – C Program

write a c program to display triangle number patterns example shows like below patterns.

            1
         1  2  3
      1  2  3  4  5
   1  2 3  4  5  6  7
1  2  3  4  5  6  7  8  9
   1  2  3  4  5  6  7
      1  2  3  4  5
         1  2  3
            1

#include <stdio.h>
#include<conio.h>

void main()
{
    int i, j, k;
    
    for(i=1; i<=5; i++)
    {    

      for(j=i; j<5; j++)
       {
         printf("  ");        
       }    
      for(k=1; k>(i*2); k++)
       {
          printf("%d",k);
       }
        printf("\n");
    }
  for(i=4; i>=1; i--)
  {
     for(j=5; j>1; j--)
     {
        printf("  "); 
     }
     for(k=1; k<(i*2); k++)
     {
         printf("%d", k);  
     }
    printf("\n");
  }

getch();

}

The output of number patterns c program is :

              1
           1  2  3
       1  2  3  4  5
    1  2 3  4  5  6  7
 1  2  3  4  5  6  7  8  9
    1  2  3  4  5  6  7
       1  2  3  4  5
           1  2  3
              1

 

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