Lab: deciding with the if statement

An if statement lets a program choose a path. This lab builds one small decision and then grows it.

The task

Store a score, then display a different message depending on its value. Start with a single condition, then add an alternative, then add a middle case.

int score = 72;

if (score >= 90)
{
    resultLabel.Text = "Excellent";
}
else if (score >= 60)
{
    resultLabel.Text = "Pass";
}
else
{
    resultLabel.Text = "Keep practising";
}

What to notice

• The first condition that is true wins, and the rest are skipped.
• The order of the conditions changes the result, so put the strictest first.
• An if can run with no else at all when nothing needs to happen otherwise.

When there are many fixed options, the switch statement lab is usually clearer.