📌 Omitting Namespace

☑️You might see some C++ programs that runs without the standard namespace library.

☑️The using namespace std line can be omitted and replaced with the std keyword, followed by the :: operator for some objects:

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Structure of C++

📌Syntax
Ways symbols may be combined to
create well-formed sentences.

📌Semantics
meaning of syntactically valid statement.

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Sample code

Basic elements of C++

0⃣ Reserved words

A reserved word is a word that cannot be used as an identifier, such as the name of a variable, function, or label

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1⃣ Identifier

is a name used to identify a variable, function, class, module, or any other user-defined item.

📌Start with a letter or underscore

📌Consist only of alpha-numeric symbols or the underscore symbol _

📌Not be a reserved word

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2⃣ Comments
a piece of descriptive text which explains some aspect of a program.

Comments can be used to explain C++ code, and to make it more readable. It can also be used to prevent execution when testing alternative code.

✅Single-line comments //

✅Multi-line comments /* */

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Data types

A data type specifies the type of data that a variable can store such as integer, floating, character etc

Operators

Operators in C++, An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations.

📌Operators in C++ can be classified into 7 types

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C++ IDE

C++ IDE👆