The else if Statement

Sometimes you need to check multiple conditions, not just two. The else if statement allows you to chain multiple conditions together, creating more complex decision-making logic.

Using else if

The else if statement sits between if and else, allowing you to test additional conditions when the first one is false.

score := 85

if score >= 90 {
    fmt.Println("Grade: A")
} else if score >= 80 {
    fmt.Println("Grade: B")
} else if score >= 70 {
    fmt.Println("Grade: C")
} else {
    fmt.Println("Grade: F")
}
// Output: Grade: B

Order Matters!

This is crucial: Go evaluates conditions from top to bottom and stops at the first one that's true. This means the order of your conditions is very important.

value := 150

// WRONG - will never reach the second condition
if value > 50 {
    fmt.Println("Greater than 50")
} else if value > 100 {
    fmt.Println("Greater than 100")  // Never executes!
}

// CORRECT - check larger values first
if value > 100 {
    fmt.Println("Greater than 100")  // This executes
} else if value > 50 {
    fmt.Println("Greater than 50")
}

In the wrong example, even though 150 is greater than 100, the first condition (value > 50) is true, so it executes that block and skips the rest. Always put your most specific or largest conditions first!

Multiple Conditions

You can chain as many else if statements as you need.

age := 25

if age < 13 {
    fmt.Println("Child")
} else if age < 18 {
    fmt.Println("Teenager")
} else if age < 65 {
    fmt.Println("Adult")
} else {
    fmt.Println("Senior")
}
// Output: Adult

Assignment

Now let's make the checkPowerLevel function more interesting by adding multiple power level tiers.

Modify the function to handle three cases (be careful about the order!):

• If powerLevel is greater than 9000, print "It's over 9000!!!"
• If powerLevel is greater than 1000000, print "Godlike!!!"
• Otherwise (when powerLevel is less than or equal to 9000), print "Meh, it's only " followed by the power level value

The function signature remains the same:

func checkPowerLevel(powerLevel int) {
    // Your code here
}