Dev c++ Lecture No 3-Beginners-What is Identifiers and Type with Example-2020

Description Admin

Name: Umair Khan

Education: Software Engineer

Degree: Bachelor

Start Series: C++

Simple my introduction Thank you.

Lecture Description:

In this tutorial we are complete define

Ø  What is identifiers?

Ø  What is Type?

Ø  What is Standard Identifier

Ø  What is User Define Identifier Rule Of Identifier

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Q&A

What is Identifiers?

Identifiers are names given to different entities such as constants, variables, structures, functions.

Example:

Int  amount, float amount, char amount.

What is Type?

ü Standard 

ü User-Define

v Standard IDENTIFIER

They are the names of operations defined in the standard C++ library. For example: cout is the name of an I/O operation.

v For Example

ü Cout

ü #include<iostream>

ü Using name Space std

v User-Define IDENTIFIER

ü An identifier is a string of alphanumeric characters

v For Example

ü Name

ü Marks

ü Age

Rule Of IDENTIFIER

Ø Letter ,Number or Underscore

Ø First character must be Letter or Underscore

Ø Blank Space not allowed

Ø Reversed Word can’t be used

Ø An Identifier can be 1 to 31 character

Ø Both upper and lower case or allowed