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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