Tringle decrement

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

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

      

      
       getch();
      
       
        }