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C++

sizeof


sizeOf is also an operator not a function, it is used to get information about the amount of memory allocated for data types & Objects. It can be used to get size of user defined data types too. Used to return the size of the object (in bytes) that is passed to it.

Syntax:
 sizeof(variable/object/datatype);


Example:

cout << sizeof(double);  //will print size of double
int x = 2;
int i = sizeof x;


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