The [ ] and ( ) Operators

Parentheses are operators that increase the precedence of the operations inside them. Square
brackets perform array indexing (arrays are discussed fully in Chapter 4). Given an array, the
expression within square brackets provides an index into that array. For example,
#include
char s[80];
int main(void)
{
s[3] = 'X';
printf(''%c", s
[3]);
return 0;
}
first assigns the value 'X' to the fourth element (remember, all arrays begin at 0) of array s, and then
prints that element.