Float and Double in C

Float

Float is a datatype which is used to represent the floating point numbers. It is a 32-bit IEEE 754 single precision floating point number ( 1-bit for the sign, 8-bit for exponent, 23*-bit for the value. It has 6 decimal digits of precision.

Here is the syntax of float in C language,

float variable_name;

Here is an example of float in C language,

Example

#include<stdio.h>
#include<string.h>
int main() {
   float x = 10.327;
   int y = 28;
   printf("The float value : %f\n", x);
   printf("The sum of float and int variable : %f\n", (x+y));
   return 0;
}

Output

The float value : 10.327000
The sum of float and int variable : 38.327000

Double

Double is also a datatype which is used to represent the floating point numbers. It is a 64-bit IEEE 754 double precision floating point number for the value. It has 15 decimal digits of precision.

Here is the syntax of double in C language,

double variable_name;

Here is an example of double in C language,

Example

#include<stdio.h>
#include<string.h>
int main() {
   float x = 10.327;
   double y = 4244.546;
   int z = 28;
   printf("The float value : %f\n", x);
   printf("The double value : %f\n", y);
   printf("The sum of float,

   double and int variable : %f\n", (x+y+z));
   return 0;
}

Output

The float value : 10.327000
The double value : 4244.546000
The sum of float, double and int variable : 4282.873000