The difference between 0 and '0' in array

Question

I have a question about array initialization

What is the difference between

char a[6]={0};

and

char a[6]={\'0\',\'0\',\'0\',\'0\',\'0\',\'0\

Answer 1

'0' is the ASCII character for the number 0. Its value is 48.

The constant 0 is a zero byte or null byte, also written '\0'.

These four are equivalent:

char a[6] = {0};
char a[6] = {0, 0, 0, 0, 0, 0};
char a[6] = {'\0', '\0', '\0', '\0', '\0', '\0'};
char a[6] = "\0\0\0\0\0"; // sixth null byte added automatically by the compiler