What's wrong with my "input number of terms", why is 8, but my input is 5

Question

#include <stdio.h>
//display the cube of the number upto a given integer.
void main()
{
int i, ctr;
printf("Input number of terms:%d \n", ctr);
scanf("%d", &ctr);
for(i=1; i<=ctr; i++)
{
printf("Number is: %d and cube of the %d is : %d \n",i,i, (i*i*i));
}
}