sizeof() Operator | Sizes ,Precision and Range of different data types

sizeof() Operator

This operator is used to find out size of variables,structures ,pointers ,etc in bytes.

Program to understand sizeof() opertaor

#include<stdio.h>

#include<conio.h>

void main()

{

int x,y;

x=98;

clrscr();

y=sizeof(x); //size of variable

printf("%d",y);

getch();

}

See Output

NOTE - We will use this operator in further posts and program to understand it more.

Program to find out size, precision and range of different data types

#include<stdio.h>

#include<limits.h>

#include<float.h>

void main()

{

clsrcr();

printf("sizeof(char)=%u\n",sizeof(char));

printf("sizeof(short)=%u\n",sizeof(short));

printf("sizeof(int)=%u\n",sizeof(int));

printf("sizeof(long)=%u\n",sizeof(long));

printf("sizeof(float)=%u\n",sizeof(float));

printf("sizeof(double)=%u\n",sizeof(double));

printf("sizeof(long double)=%u\n",sizeof(long double));

printf("SCHAR_MIN= %d\n",SCHAR_MIN);

printf("SCHAR_MAX= %d\n",SCHAR_MAX);

printf("UCHAR_MAX= %d\n",UCHAR_MAX);

printf("SHRT_MIN= %d\n",SHRT_MIN);

printf("SHRT_MAX= %d\n",SHRT_MAX);

printf("USHRT_MAX= %d\n",USHRT_MAX);

printf("INT_MIN= %d\n",INT_MIN);

printf("INT_MAX= %d\n",INT_MAX);

printf("UINT_MAX= %d\n",UINT_MAX);

printf("LONG_MIN= %d\n",LONG_MIN);

printf("LONG_MAX= %d\n",LONG_MAX);

printf("ULONG_MAX= %d\n",ULONG_MAX);

printf("FLT_MIN= %d\n",FLT_MIN);

printf("FLT_MAX= %d\n",FLT_MAX);

printf("DBL_MIN= %d\n",DBL_MIN);

printf("DBL_MAX= %d\n",DBL_MAX);

printf("LDBL_MIN= %d\n",LDBL_MIN);

printf("LDBL_MAX= %d\n",LDBL_MAX);

/*Number of digits of precision*/

printf("FLT_DIG=%d\n",FLT_DIG);

printf("DBL_DIG=%d\n",DBL_DIG);

printf("LDBL_DIG=%d\n",LDBL_DIG);

getch();

}

See Output