The "sizeof" Operator

You can use the sizeof operator to obtain the size (in bytes) of the data type of its operand. The operand may be an actual type specifier (such as int or date), as well as any valid expression. If the parameter is type of string, you can also use strlen function. Here are some examples:

int a = sizeof(int);
int b = sizeof(bool);
int c = sizeof(5);
int d = sizeof(5.143);
int e = sizeof(a);

The result of the sizeof operator is of type int.