std::print (C++23)

In a Nutshell

Directly outputs formatted strings to stdout -- the fusion of std::format and std::cout, the new C++23 way to write Hello World.

Header

#include <print>

Core API Quick Reference

Operation	Signature	Description
Output to stdout	void print(format_string, args...)	Format and output to standard output
Output with newline	void println(format_string, args...)	Automatically appends a newline
Blank line	void println()	Outputs only a newline character
Output to file	void print(FILE* f, format_string, args...)	Output to a specified C file stream
Output to file with newline	void println(FILE* f, format_string, args...)	Newline version
Output to stream	void vprint_unicode(std::ostream&, ...)	Output to a C++ stream

Minimal Example

// Standard: C++23
#include <print>

int main() {
    std::print("Hello, {}!\n", "world");
    std::println("value = {}", 42);
    std::println("{:>10.2f}", 3.14159); //       3.14
    std::println();                      // blank line
}

Embedded Applicability: Low

• Depends on stdout and filesystem abstraction layers; bare-metal environments typically have no standard output
• Suitable for embedded Linux host-side tools and test framework log output
• The formatting engine has significant Flash overhead; not recommended for extremely resource-constrained devices
• The {fmt} library's fmt::print can serve as a fallback for C++11 and later

Compiler Support

GCC	Clang	MSVC
14	18	19.34

See Also

• cppreference: std::print

---

Some content adapted from cppreference.com under CC-BY-SA 4.0 license