(C++) Variable

A variable is something to store data in.

Don't declare a variable until you have a value to initialize it with [1].

In the code example below, there are two variables, number and i (actually argc and argv are also variables, but see their pages what they are)

include <iostream>


int main()
{
  int number = 0;
  for (int i = 0; i<10; ++i)
  {
    number+=i;
    std::cout << i << " : " << number << std::endl;
  }
}

The variable number has the entire main function as its scope. The variable only has the for loop as its scope.

There are many different data types of variables.

Topic links

'Variable' links

Reference

1) Bjarne Stroustrup. The C++ Programming Language (3rd edition).ISBN: 0-201-88954-4 6.5.10: 'Don't declare a variable until you have a value to initialize it with'.

last edited (November 18, 2006) by bilderbikkel, Number of views: 8779, Current Rev: 10 (Diff)

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