Error Handling

(try…catch)

Error handling helps your program respond safely when something goes wrong.

Missing LEGO Piece Example

If a LEGO piece is missing, you don’t throw the whole set away; you pause, handle the problem, and keep going.

try { let result = notARealFunction(); } catch (error) { console.log(“Oops! Something went wrong.”); }

Explanation:

• try { … } means “try running this code”
• If it fails, JavaScript jumps to catch
• catch(error) receives info about what went wrong
• You can show a friendly message instead of crashing

Trampoline Metaphor:

• try = jump
• catch = trampoline catches you
• So you don’t hit the ground (crash)

Mini-Quiz

1. What is the job of catch?
2. Does try…catch prevent mistakes, or help handle them?