Getting wrong string length

Question

I am trying to get the length of a string but i am getting the wrong value, it is saying that it is only 4 characters long. Why is this? am i using sizeof() correc

Answer 1

In addition to strlen(), you can assign string literal to array of chars char s[] = "hello world", in this case sizeof() returns size of array in bytes. In this particular case 12, one extra byte for \0 character at the end of the string.

Runtime complexity of sizeof() is O(1).

Complexity of strlen() is O(n).