C++ · Chapter 5 of 49
C++ Output
The `std::cout` object, combined with the `<<` insertion operator, is the standard way to print to the console in C++. You can chain multiple `<<` operators to print several values in one statement.
Use `std::endl` or `\n` to move to a new line. `std::endl` also flushes the output buffer, while `\n` is slightly faster.
Printing values
`cout << "text"` prints a string literal; you can also print numbers, characters, and variables directly, all chained with `<<`.
New lines
`\n` inside a string literal inserts a newline character. `std::endl` does the same but also forces the buffer to flush to the terminal immediately.
Example 1 (cpp)
#include <iostream>
using namespace std;
int main() {
cout << "Score: " << 95 << "\n";
}Output
Score: 95Chaining << lets you mix strings and numbers in one line.
Example 2 (cpp)
cout << "Line1" << endl << "Line2";Output
Line1
Line2endl moves to the next line and flushes output.
Key points
- std::cout with << prints to the console.
- You can chain multiple << in one statement.
- \n inserts a newline; endl also flushes the buffer.
- using namespace std lets you drop the std:: prefix.
💡 Note: Prefer \n over endl in performance-critical loops, since endl's flush is comparatively slow.