# <format>

**[<format>](https://en.cppreference.com/w/cpp/header/format)** provides `std::format`, a type-safe, fast, printf-style formatting function introduced in C++20. It replaces most uses of `sprintf`, string streams, and `std::cout` manipulators.

It supports compile-time format string checking (in some implementations) and is faster than stream-based formatting.

## Example

This example demonstrates type-safe formatting with automatic type deduction, creating formatted output with precision control.

```cpp
// compile: g++ -std=c++20 -o formatexample formatexample.cpp
// run: ./formatexample
// description: type-safe formatting with std::format

#include <format>
#include <iostream>

int main() {
    int x = 42;
    double pi = 3.14159;
    std::string name = "Alice";
    
    std::cout << std::format("hello {}, x={}, pi={:.2f}\n", name, x, pi);
    
    return 0;
}
```