double data type

double data type in c programming language

It is a keyword.

1010301.23, 22332.97, 111211.00001, 124961.99 etc is example of double type value. 1001, 232, 111, 121, etc. is not example of double type value.But double type variable can hold this type value.

size of double is 8 byte according to 32-bit operating system.

%lf is used in printf() function to print double type value.

Program

#include <stdio.h> 
#include <conio.h> 
void main(){
double a = 981933.121; 
 clrscr(); 
 printf("value of a = %lf",a); 
 getch(); 
}

See Output

%lf is used in scanf() function to read double type value.

Program

#include <stdio.h> 
#include <conio.h> 
void main(){ 
 double a; 
 clrscr();
 printf("Enter value of a: ");
 scanf("%lf",&a);/*  & is used before variable name when you want to read data*/
 printf("\n value of a = %lf",a);
 getch();
}

See Output

Program

#include <stdio.h> 
#include <conio.h> 
void main(){ 
 double a;
 clrscr();
 printf("Enter value of a: ");
 scanf("%lf",&a);/*  %.2f is used to print two decimal places. */
 printf("\n value of a = %.2lf",a);
 getch();
}

See Output

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