Dec 29, 2024 · When applied to an expression, sizeof does not evaluate the expression (i.e. the expression is an unevaluated operand)(since C++11), and even if the expression designates a …

Oct 17, 2025 · sizeof () operator is a very useful tool that helps programmers understand how much memory a variable or data type occupies in the computer's memory. It is a compile-time unary …

Aug 3, 2021 · The sizeof operator gives the amount of storage, in bytes, required to store an object of the type of the operand. This operator allows you to avoid specifying machine-dependent data sizes …

sizeof is a unary operator in the C and C++ programming languages that evaluates to the storage size of an expression or a data type, measured in units sized as char.

To actually get the size (in bytes) of a data type or variable, use the sizeof operator: Note that we use the %zu format specifier to print the result, instead of %d. This is because the compiler expects the …

Dec 26, 2024 · In order to determine the size of data types on a particular machine, C++ provides an operator named sizeof. The sizeof operator is a unary operator that takes either a type or a variable, …

Aug 29, 2025 · Learn the sizeof operator in C with syntax, examples, and practical uses. Understand how sizeof helps manage memory in C programming.

The sizeof operator is a compile−time unary operator. It is used to compute the size of its operand, which may be a data type or a variable. It returns the size in number of bytes. It can be applied to …

Feb 8, 2025 · The sizeof operator is a compile-time unary operator in C that returns the size in bytes of its operand. It calculates the memory space required to store a data type or variable, returning an …

The sizeof operator is a compile-time operator that returns the size of the argument passed to it. The size is a multiple of the size of a char, which on many personal computers is 1 byte (or 8 bits).