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References, Pointers and Constants

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Simple C++ Data Types

C++ Code What It Means When To Use It

char
int
double

Single (scalar) value (character, integer, floating point number)

To store data
To pass data to a function by value
To return data by value

const char
const int
const double

Constant value

To declare a constant -- a value that cannot be changed
Has no effect for passing values to a function or from returning values from a function

char []

int []
double []

Array (vector) of values
(char [] is a string)

To store the same type of data together
To pass an array to a function