What does the term “real constant” refer to in the C pr…

In the C programming language, real constants refer to constants that represent real numbers (floating-point numbers). They are used to represent numerical values with decimal parts.

Constant literals can be written in the following ways:

1. Decimal representation: Real constants can be represented using decimal numbers, such as 3.14, 0.5, etc.
2. Exponential notation (scientific notation): Exponential notation can be used to represent very large or very small real constants in order to make it more convenient. It consists of a number, followed by an ‘e’ or ‘E’ and another number, representing mEn, where m is the mantissa and n is the exponent. For example, 6.022e23 represents Avogadro’s number.
3. Octal representation: In C language, octal real constants begin with 0 followed by one or more octal digits. For example, 034.56 represents the octal number 34.56.
4. In hexadecimal notation, hexadecimal floating-point constants start with 0x or 0X, followed by one or more hexadecimal digits and an optional decimal point. For example, 0x1A.2p3 represents the hexadecimal number 1A.2 multiplied by 2 to the power of 3.

Please note that real constants default to the double type. If you want to specifically specify it as a float type, you can add an f or F suffix after the constant. For example, 3.14f represents a real constant of type float.

In the C language, real constants are constants used to store floating-point numerical values, and can be used in variable initialization, assignment, and expressions.