devxlogo

The Sizeof() Operator Only Works at Compile Time

Why Trust Us

The Sizeof () operator only works at compile time and doesn’t evaluate anything at run time.

In the following code snippet, the func() function is never called. The inner sizeof() returns the size of short (return type of func()) and the outer sizeof() returns the size of size_t?in other words, the unsigned int (return value of sizeof()):

short func(short x){   printf("%d", x);   return x;}int main(){   printf("%d", sizeof(sizeof(func(3))));}

Charlie has over a decade of experience in website administration and technology management. As the site admin, he oversees all technical aspects of running a high-traffic online platform, ensuring optimal performance, security, and user experience.

See also  How Seasoned Architects Evaluate New Tech
Disclosure

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

Show More