G-Fact 1 | (Sizeof is an operator)
In C language, sizeof( ) is an operator. Though it looks like a function, it is an unary operator.
For example in the following program, when we pass a++ to sizeof, the expression “a++” is not evaluated. However in case of functions, parameters are first evaluated, then passed to function.
// C program to demonstrate that sizeof // is an operator #include<stdio.h> int main() { int a = 5; printf("%d\n", (int)sizeof(++a)); printf("%d", a); return 0; } |
Output :
4 5
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