# C++20
C++20 introduces `format()`, so we can do the following.
```cpp
#include <iostream>
#include <format>
#include <cmath>

int main() {
  for(int i=0; i<10; i++) {
    double x = pow(2.0,i);
    std::cout << std::format("Hello {}! {} {:.03f}\n", "world", i, x);
  }
}
```
Compile with
```bash
g++ -o a -std=c++20 a.cpp
```
(Note the `-sdc=c++20` as g++ uses an earlier standard by default.)

# Resources
* This [stackoverflow](https://stackoverflow.com/questions/2342162/stdstring-formatting-like-sprintf)