n8n LabBeginner
Convert a String to a Number in n8n
A form sends quantity as text, so '2' + 1 becomes '21'. Convert it before doing math.
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Incoming Data
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n8n Node
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Next Step
> Ready. Type your expression below and click "Check Answer" to run the node.
Incoming Payload / Data:
{
"quantity": "12"
}
⚙️ Your expression is executed against test data — any correct solution passes. +10 XP
✅ Solution & explanation
parseInt($json.quantity)
Output: 12
Form and webhook values often arrive as strings.
parseInt() reads a whole number; Number() converts the whole string (including decimals) and returns NaN if it isn't numeric.💡 Pro tip: For prices with decimals use parseFloat($json.price) or Number() — parseInt drops the decimals.
Also accepted: Number($json.quantity), parseInt($json.quantity, 10)