Difference between Double and Float in C
Double and Float:
On this page we will discuss about the difference between double and float in C programming language.
Definitions:
Double
- In programming languages, this is the most used data type for assigning values with a real or decimal-based number within, such 3.14 for pi.
- It has two times as much precision as a float, or double precision.
- Double type variables can be given a value that falls between the ranges of 2.3E-308 and 1.7E+308.
- Double requires storage of 8 bytes.
- It has a precision of 15 decimal places.
- It features a 64-bit floating point precision, according to IEEE.
Float
- This is typically used for graphic-based libraries since it makes it easier for compilers to manage your programs’ processing capacity.
- Float has single precision.
- The storage required by Float is 4 bytes.
- Float variables can be given a value with a range of 1.2E-38 to 3.4E+38.
- It features a 32-bit floating point precision, according to IEEE.
- It has a precision of six decimal places.
| Float | Double |
|---|---|
| Float requires storage of 4 bytes. | Double requires storage of 8 bytes. |
| It features a 32-bit floating point precision, according to IEEE. | It features a 64-bit floating point precision, according to IEEE. |
| It has a precision of 6 decimal places. | It has a precision of 15 decimal places. |
| Float variables can be given a value with a range of 1.2E-38 to 3.4E+38. | Double type variables can be given a value that falls between the ranges of 2.3E-308 and 1.7E+308. |
| Float has single precision. | Double has two times as much precision as a float, or double precision. |
Example of Float and Double:
Run
#include<stdio.h>
int main ()
{
int a = 12, b = 25, sum;
float c = 11.23, d = 15.23, add;
sum = a + b;
add = c + d;
printf ("The sum of a and b is : %d\n", sum);
printf ("The sum of c and d is : %d", add);
return 0;
}
Output:
The sum of a and b is : 37 The sum of c and d is : -11046240
Example of Float:
Run
#include<stdio.h>
int main ()
{
double a, b, Result;
printf ("Enter two numbers = ");
scanf ("%lf %lf", &a, &b);
Result = a * b;
printf ("Result = %.2lf", Result);
return 0;
}
Output:
Enter two numbers = 4 8 Result = 32.00
Example of Double:
Run
#includedouble feetToMeter (double feetInput) { return feetInput / 3.28; } int main () { double feetInput; double meterValue; printf ("Input the value in feet = "); scanf ("%lf", &feetInput); meterValue = feetToMeter (feetInput); printf ("The value in meter is = %lf", meterValue); return 0; }
Output:
Input the value in feet = 6 The value in meter is = 1.829268
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