C++:Hello World

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Hello World

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The number one program is Hello World. This program prints the string "Hello World".

#include

iostream is part of the standard library that comes with C++, iostream deals with input, output streams.

using namespace std;

cout belongs to namespace std, it's full name is std::cout we can shorten this to cout by using the namespace.

main

The method main is the one that gets run.

cout <<

cout represents the standard

(console) output. The operator << takes an output stream on the left

value to be output on the right.

.

#include <iostream> using namespace std; int main () { cout << "Hello World!\n"; return 0; }

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