Track 3 · Lesson 4 of 11

Combining conditions with and, or, not

Join conditions with and, or and not, use short-circuiting to avoid errors, and control precedence with parentheses.

You will be able to

• Combine conditions with and, or and not and predict the result
• Use short-circuit evaluation to skip a check that would crash
• Apply operator precedence (not, then and, then or) and add parentheses for clarity
• Recognise and fix the x == a or b mistake