Skip to content
Related Articles

Related Articles

G-Fact 1 | (Sizeof is an operator)

View Discussion
Improve Article
Save Article
  • Difficulty Level : Easy
  • Last Updated : 31 Oct, 2020
View Discussion
Improve Article
Save Article

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
int main()
    int a = 5;
    printf("%d\n", (int)sizeof(++a));
    printf("%d", a);
    return 0;

Output :


This article is contributed Shivam Gupta. If you like GeeksforGeeks and would like to contribute, you can also write an article and mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above

My Personal Notes arrow_drop_up
Recommended Articles
Page :

Start Your Coding Journey Now!