Write a program that displays the square of numbers between 0 and 20.

Difficulty level
This exercise is mostly suitable for students 
#include <stdio.h>
#include <conio.h>

void main()
{
	int I;
	for (I = 0; I <= 20; I++)
		printf("The square of %d is %d \n", I, I*I);

	getch();
}
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