Basic Data Types

Basic Data Types:

C++ provides a rather large number of types. However, you can write perfectly good programs using only five of those:

👁 Basic C++ Data Types

Here are some examples of declaring and initializing variables:

int age =28;
double price =8.99;
char grade ='A';
std::string message ="Game Over";
bool late_to_work =true;
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Datatype Modifiers:

As the name implies, datatype modifiers are used with built-in data types to modify the length of data that a particular data type can hold. Data type modifiers in C++ are:

• signed
• unsigned
• short
• long

We will learn about these in a bit!

Const:

const (constant) variables cannot be changed by your program during execution.

constdouble quarter =0.25;
// and now variable quarter can only be 0.25
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Simply add the keyword const before the data type during declaration to make the variable not modifiable.

Type Conversion:

A type cast is basically a conversion from one type to another.

The notation (type) value means “convert value to type“. So for example:

double weight1;
int weight2;
weight1 =154.49;
weight2 =(int) weight1;
// weight2 is now 154
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Note: Going from a double to an int simply removes the decimal. There’s no rounding involved.

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