println-macro

println! macro for printing output

The Rust println! macro is a built-in macro that is used to print text to stdout (standard output).

Here is an example code that uses the println! macro to print a simple message to the console:

fn main() {
    println!("Hello, World!");
}

In this example, we call the println! macro with one argument: the string "Hello, World!". The macro then prints the string to the console.

The println! macro is similar to the print! macro, but adds a newline character (\n) to the end of the output, while the print! macro does not.

The println! macro can also accept additional arguments for string formatting. For example, we can use the {} placeholder to insert variables or values into the output string:

fn main() {
    let name = "Alice";
    let age = 30;
    println!("My name is {} and age is {}", name, age);
}

In this example, we use two placeholders ({}) in the output string to print the values of the name and age variables. When the macro is executed, it replaces the {} placeholders with the corresponding values ("Alice" and 30, respectively). The resulting output would be:

My name is Alice and age is 30

The println! macro is similar to the format! macro for formatting strings, and the write! macro for writing formatted data into a buffer.