The Sizeof operator is one of the C Programming Operator, which is mostly used in finding the array size, structure size and then do some calculations as per the results. The C sizeof operator returns the size (number of bytes) of declared variable or data type. Let us see one example for better understanding
C Sizeof Operator Example
In this program, We are going to check the size of integer, float, character, double and character array using sizeof operator.
CODE
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/* C Sizeof Operator Example */ #include <stdio.h> int main() { int a; int b[20]; printf(" Size of int data type:%d \n ", sizeof (int) ); printf(" Size of char data type:%d \n ", sizeof (char) ); printf(" Size of float data type:%d \n ", sizeof (float) ); printf(" Size of double data type:%d \n ", sizeof (double) ); printf(" Size of int data type:%d \n ", sizeof (a) ); printf(" Size of an int array:%d \n ", sizeof (b) ); return 0; } |
OUTPUT
sizeof (b): Although we declared the size of the b as 20 but it display output as 80 because b array will store 20 integer members and every integer member needs 4 bytes of space ( means 20 * 4 Bytes for every integer member.)
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