BASICS OF C:

1. Variables
2. Data Types
3. Operators
4. Control Statements
5. Looping Statements
6. Array

A variable is a name of the memory location. It is used to store data. Its value can be changed, and it can be reused many times.

Rules:

• A variable can have alphabets, digits, and underscore.
• A variable name can start with the alphabet, and underscore only. It can't start with a digit.
• No whitespace is allowed within the variable name.
• A variable name must not be any reserved word or keyword. e.g: int, float, etc.

Types:

1. Local variable
2. Global variable
3. Static variable
4. Automatic variable
5. External variable

Data Types:

A Data type specifies the type of data that a variable can store.

Types:

Operators:

An Operator is simply a symbol that is used to perform operations.

Types:

• Arithmetic Operators
• Relational Operators
• Shift Operators
• Logical Operators
• Bitwise Operators
• Ternary or Conditional Operators
• Assignment Operator
• Misc Operator

Control Statements:

A Control Statement is used to check the conditon.

Types:

• If statement
• If-else statement
• If else-if ladder
• Nested If

Looping Statements:

The Looping can be defined as repeating the same process multiple times until a specific condition satisfies. There are three types of loops used in the C language.

Types:

• For loop
• While loop
• Do-While loop
• Nested loop

Array:

An Array is defined as the collection of similar type of data items stored at contiguous memory locations. Arrays are the derived data type in C programming language which can store the primitive type of data such as int, char, double, float, etc. It also has the capability to store the collection of derived data types, such as pointers, structure, etc. The array is the simplest data structure where each data element can be randomly accessed by using its index number.

Types:

• 1-D Array(One Dimensional Array)
• 2-D Array(Two Dimensional Array)