Question

What is the difference between the following two declarations?

char array[] = “Hello World”;

char *array = “Hello World”;

Answer 1

The answer to this question is as follows:

The basic difference between the char array[] and char* array is one is pointer variable and other one is the array that it holds the values

The char *array is a variable that we can initialize with the values but the char array[] is of array type we can perform indexing on this and the value starts from the address that holds the 'H'

and also one major difference is running time complexity

For example:

char *array="world" if you want to print from "orld" then you can shift the pointer to the right by using array++

it takes O(1) time complexity

but with the char array[] takes O(n) time complexity because it needs to run through out the loop so it takes for loop  and taking the index values from the 1 to n so it takes the time complexity of O(n)