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  1. #include <stdio.h>
  2.  
  3. int main()
  4. {   
  5.     int loop = 9; 
  6.     int i;
  7.     int j;
  8.     int sloop;
  9.  
  10.     for(i = 1; i <= loop; i++){
  11.  
  12.         sloop = loop-i;
  13.  
  14.         for(j = 1; j <= sloop; j++ ){
  15.             printf(" ");
  16.         }
  17.  
  18.         for(j = 1; j <= loop-sloop; j++){
  19.             printf("%d", j);
  20.         }
  21.  
  22.         for(j = loop-sloop-1; j >= 1; j--){
  23.             printf("%d", j);
  24.         }
  25.  
  26.         printf("\n");
  27.     }
  28.  
  29.     return 0;
  30. }
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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Standard input is empty
stdout
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        1
       121
      12321
     1234321
    123454321
   12345654321
  1234567654321
 123456787654321
12345678987654321
https://ideone.com/PT6vgJ
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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