Increment integers - augmented assignment

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• Instead of x = x + 1 we can use x += 1 called augmented assignment.
• There are no prefix and postfix increment and decrement operators.

examples/numbers/increment/src/main.rs

#[allow(clippy::assign_op_pattern)]
fn main() {
    let mut x = 1;
    println!("{x}");

    x = x + 1;
    println!("{x}");

    x += 1;
    println!("{x}");

    // Rust has no prefix and postfix increment operator
    // x++;
    // ++x;
}

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