Floats and Doubles Data Types in Programming

Real Numbers

The  C language provides two data types to deal with real numbers (numbers with decimal points e.g. 1.35, 253.235). The real numbers are also known as floating point numbers

Float

Double

Float Data Type

To store numbers, float data type is used. The float data type uses four bytes to store a real number

Double Data Type

If we need to store a large real number which cannot be store in four bytes, then we use Double data type. Normally the size of double is twice the size of float. In Double x = 3264664.548797