sizeof() operator, Returns the size of a variable.

C Programming Language / Operators and Enums in C Language

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Program:

//Assignment operator 

// sizeof() operator

#include"stdio.h"
void main() {
   int a = 4;
   short b;
   double c;
   int* ptr;

   /* example of sizeof operator */
   printf("Line 1 - Size of variable a = %d\n", sizeof(a) );
   printf("Line 2 - Size of variable b = %d\n", sizeof(b) );
   printf("Line 3 - Size of variable c= %d\n", sizeof(c) );


}

Output:

Line 1 - Size of variable a = 4
Line 2 - Size of variable b = 2
Line 3 - Size of variable c= 8
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