C Floating-Point Representation Explained

In C language, floating-point data can be represented in the following way:

1. Single precision floating point (float): Declared using the keyword float, it can store up to 6 decimal places of accuracy. For example: float num = 3.14.
2. Double-precision floating-point (double): Declared using the keyword double, can store up to 15 decimal places. For example: double num = 3.1415926;
3. Long double data type: Declared using the keywords long double, can store more significant digits depending on the compiler’s implementation. For example: long double num = 3.14159265358979323846;

Floating-point data can represent numbers in decimal and scientific notation form, for example:
float num1 = 0.1;
double num2 = 1e-6;
long double num3 = 1.23456789e20;

It is important to note that floating-point data may have accuracy issues when compared because computers represent floating-point numbers in binary, causing some decimal numbers to be unable to be accurately represented as binary numbers. When comparing floating-point numbers, it is important to use an appropriate margin of error for comparison rather than directly comparing for equality.