What are numerical constants in C language?

Numeric constants in C language represent fixed values ​​and cannot be modified. The main types include integers, floating point, characters and strings. Constants improve readability, reduce errors, and optimize code.

Numeric constants in C language

Numerical constants refer to fixed numerical values ​​in C language programs. symbol. These constants cannot be modified, and once defined, their values ​​do not change.

Type

The numerical constants in C language mainly have the following types:

• Integer constant: represents an integer, can Is decimal, octal or hexadecimal. For example: 123, 077, 0xAB
• Floating point constant: represents a floating point number, including the decimal part. For example: 12.5, 3.14159
• Character constant: represents a single character, enclosed in single quotes. For example: 'a', 'B'
• String constant: represents a string of characters, enclosed in double quotes. For example: "Hello", "World"

Usage

Numeric constants can be used directly in the program or as part of an expression. They are typically used to initialize variables, specify array sizes, or perform calculations.

Advantages

The benefits of using numeric constants include:

• Improve code readability: constant names are more descriptive, Helps understand the code.
• Reduce errors: Constant values ​​cannot be modified, so errors caused by accidental modification of variables can be avoided.
• Optimize code: The compiler can identify constants and optimize them to improve code execution efficiency.

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