If Statements

Relax. We'll talk through this in plain words — no textbook voice.

if statements decide which code block to run based on a condition. They're essential for things like login success/fail, grading scores, user role permissions, and form validation.

swift

let score = 82

if score >= 90 {
    print("Grade A")
} else if score >= 75 {
    print("Grade B")
} else if score >= 60 {
    print("Grade C")
} else {
    print("Try again")
}

Swift checks conditions from top to bottom. score >= 90 isn't true, so it moves on to check the next condition — score >= 75 — which is true, so it outputs Grade B.

You should see

Grade B

Easy traps

if score = 90 is wrong because = is assignment. Use == when you want to compare.