sizeof operator in c

sizeof operator in c, returns the size of following:

1. Variables data type
2. Data type.

Syntax

sizeof(data-type);
sizeof(variable-name);

Example

#include<stdio.h>

void main()
{
	int a = 20;
        // variable of variable according to its data type
	printf("Size of integer variable is %d - ", sizeof(a));

       // Data type size
       printf("Size is %d - ", sizeof(float));
}