Expression switch statements

While it’s possible to add as many else if statements to an if statement as you want, at some point, it’ll get hard to read.

When this happens, you can use Go’s logic alternative: switch. For situations where you would need a big if statement, switch can be a more compact alternative.

The notation for switch is shown in the following code snippet:

switch <initial statement>; <expression> {
case <expression>:
  <statements>
case <expression>, <expression>:
  <statements>
default:
  <statements>
}

The initial statement works the same in switch as it does in the preceding if statements. The expression is not the same because if is a Boolean expression. You can have more than just a Boolean in this expression. The cases are where you check to see whether the statements get executed. Statements are like code blocks in if statements, but with no need...