C language is mainly composed of keywords, data types, variables, constants, operators, expressions, statements, functions and header files.

The main components of the C language

The C language consists of the following main components:

1. Keywords

• Keywords are special words predefined in C language, used for specific purposes, such as:

  • Control flow keywords such as if, else, for, while, etc.
  • Data type keywords such as int, float, char, etc.

2. Data Type

• The data type defines the type of value that the variable can store, such as:

  • Integer: int
  • Floating point number : float
  • Character: char

3. Variable

• variable is used Store data, they have a name and a data type, such as:

  • int age = 25;

4. Constant

• Constant is a variable whose value is immutable, such as:

  • define PI 3.14159265

5. Operator

• Operator performs operations, such as:

  • (addition)
  • -(Subtraction)
  • *(Multiplication)
  • /(Division)

6. Expression

• An expression is a code segment containing variables, constants, and operators that calculates a value, such as:

  • age 10

7. Statements

• Statements are lines of code that perform specific operations, such as:

  • printf("Hello world!\n");

8. Function

• A function is a reusable set of code that performs a specific task, such as:

  • int add(int a, int b) { return a b; }

9. Header file

• #Header file contains declarations of functions, constants and macros, such as:

  • include

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