Write a program that reads a positive integer N and displays:

1
22
333
4444
…
NNNN….N

Difficulty level
Video recording
This exercise is mostly suitable for students 
#include<stdio.h>
int main()
{
	int N, i, j;
	do{
		printf("Enter N: ");
		scanf("%d",&N);
	}while(N<=0);

    for(i=1;i<=N;i++)
    {
        for(j=1;j<=i;j++)
            printf("%d",i);
        printf("\n");
    }
            
	return 0;
}
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