CODE EXAMPLE FOR C

size_t in c

// C program to demonstrate that size_t or
// any unsigned int type should be used 
// carefully when used in a loop.
#include<stdio.h>
  
#define N 10
  
int main()
{
    int a[N];
  
    // This is fine.
    for (size_t n = 0; n < N; ++n) {
        a[n] = n;
    }
          
    // But reverse cycles are tricky for unsigned 
    // types as they can lead to infinite loops.
    for (size_t n = N-1; n >= 0; --n)
        printf("%d ", a[n]);
}