Assignment Operators

That while example added a new type of expression we haven't seen yet:

counter += 1;

The += is an "assignment operator". They're like the comparison operators we saw earlier (like <, >= and ==). But, instead of telling us if the expression they are in is true, assignments operators do math on the values on either side.

For example, the += adds whatever is on the right side to the value on the left. So, this will give us an output of

1
2
3

SOURCE CODE

fn main() {
  let mut alfa = 1;
  println!("{}", alfa);

  alfa += 1;
  println!("{}", alfa);

  alfa += 1;
  println!("{}", alfa);
}

CODE RUNNER

Typos: 0
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