C Program to Find the Size of Data Types

Program to Find the Size of datatypes

#include<stdio.h>

int main() {
  int intData;
  float floatData;
  char charData;
  double doubleData;
  printf("Size of int is %zu bytes\n", sizeof(intData));
  printf("Size of float is %zu bytes\n", sizeof(floatData));
  printf("Size of char is %zu byte\n", sizeof(charData));
  printf("Size of double is %zu bytes\n", sizeof(doubleData));
  return 0;
}

Output

Size of int is 4 bytes
Size of float is 4 bytes
Size of char is 1 byte
Size of double is 8 bytes

Working of the above program

• First we declare integer variable intData, float variable floatData, char variable charData and double variable doubleData to further calculate their size.

int intData;
float floatData;
char charData;
double doubleData;

• Finally we get the size of the variables of different datatype in first step using sizeof() function.

  printf("Size of int is %zu bytes\n", sizeof(intData));
  printf("Size of float is %zu bytes\n", sizeof(floatData));
  printf("Size of char is %zu byte\n", sizeof(charData));
  printf("Size of double is %zu bytes\n", sizeof(doubleData));