If you are unaware of the size of float and double data types in C and C++, follow this article’s guidelines to learn how to find their sizes.
Before moving towards finding the size of float and double data types, first you must learn about them if you are a beginner.
What are float and double Data Types in C and C++
The float data type is utilized in C and C++ programming to hold floating-point values, which can either be decimal or exponential. You must use the %f specifiers with the float data type variable to output them on the console screen for the case of C programming. While for C++, there are no specifiers for printing the floating-point values.
The double data type has been employed in C and C++ to hold decimal numbers alongside double precision. This is utilized in both C++ and C to specify numerical values which include decimal numbers. A double data type represents an accurate data type capable of storing 64 bits of decimal or floating-point numbers. Because a double appears to have greater precision compared to a float and it consumes twice the memory of the floating-point type. It can quickly hold sixteen to seventeen digits following or preceding a decimal point. In C programming, the double data type variables are printed via %lf specifiers, while in C++, they are simple to be printed using cout.
Find the Size of float and double in C and C++
To find the size of float and double in C and C++, we will use the sizeof function, which is a built-in function in both programming languages.
To find the size of float and double in a C program, follow the below-given code:
Output
The above code outputs the size of float and double in C, which is 4 bytes (32Bits) and 8 bytes (64Bits), respectively.
To find the size of float and double in a C++, follow the below-given code:
using namespace std;
int main()
{
float float_Type;
double double_Type;
cout << "Size of float= " <<
sizeof(float_Type) <<" bytes\n";
cout << "Size of double= " <<
sizeof(double_Type) <<" bytes \n";
return 0;
}
Output
The above code output confirms the size of float and double in C++ is 4 bytes (32Bits) and 8 bytes (64Bits), respectively like C.
Conclusion
float and double are widely used datatypes in C and C++ and they both represent real numbers in fractions. However, they are different in size. The size of float and double in C and C++ is 4 bytes (32Bits) and 8 bytes (64Bits), respectively, which can be found through the sizeof function discussed in the above-mentioned guidelines.
