cout>>endl

Can someone explain what are

Code:

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cout and endl

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and what are they used for.

In C++, I/O is done using streams. cout is a variable of type ofstream that is bound to the standard file stdout. This means, basically, that any output sent to cout appears on the console:

Code:

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cout << "Here is a string";

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endl is actually a function, that adds a newline, then flushes the buffer. It's effectively:

Code:

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cout << "String" << endl;

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equals:

Code:

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cout << "String" << "\n";
cout.flush();

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There are also streams called cin (stdin), and cerr (stderr).

Code:

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#include <iostream.h>

int main()
{
        cout << "Hello" << endl;
        cout << "World!" << endl;
        cout << "\n";
        cout << "OR without endl";
        cout << "\n";
        cout << "Hello";
        cout << "World!";
        return 0;
}

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endl makes the next thing added on a new line
/n has the same effect except it has to be part of a string
cout displays text in a console window. It has to be followed by << and then the string

Code:

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int decared_variable
cin >> declared_variable

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waits for the user to enter a value (in this case a long integer)

I hope this helps,

Me.