Pyramid Problem No. 30

 Q.30. Write a C program to display the following number triangle structure:-

     1
    21
   321
  4321
 54321

Solving in C:

    #include <stdio.h>
    int main(){
        int row,col;
        for(row=1;row<=5;row++){
            for(col=5;col>=1;col--){
                if(row>=col) printf("%d",col);
                else printf(" ");
            }
            printf("\n");
        }
        return 0;
    }