CODE EXAMPLE FOR C

size_t in c

// Declaration of various standard library functions.
  
// Here argument of 'n' refers to maximum blocks that can be
// allocated which is guaranteed to be non-negative.
void *malloc(size_t n);
  
// While copying 'n' bytes from 's2' to 's1'
// n must be non-negative integer.
void *memcpy(void *s1, void const *s2, size_t n);
  
// strlen() uses size_t because the length of any string
// will always be at least 0.
size_t strlen(char const *s);