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How to Create a Variable in the C++ Programming Language

5/4/2019
Learn how

We can create variables in C++ using the following syntax:

TYPE varName;

We declare the variable first with the data type, followed by the desired name. For example, if you want to store a person's age, you could do:

int age;

The left-hand side is the data type: an integer. The right-hand side is the variable name.

You can assign a value to a variable like so:

age = 35

Simply add the equal sign for the assignment operation, the value of the variable on the right-hand side. Note this is not a comparison.

You can declare your variable using other types, too. For instance, in the following examples we declare and define the values at the same time:

double circleArea = 3.123;

bool loading = true;

std::string name = "Roger";

A double is a floating point type that allows for the representation of numbers that have a fractional part.

A bool is a boolean type that has value that is either true or false.

A string is a sequence of characters. The string type belongs to the std namespace.

Here is a program for you to play with

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