Question types

Every question a form can ask. Each one can be required; a required question that's left empty says what to do, in the words below, right under it.

Questions

Question	What it collects	What it says when it needs fixing	A price formula can use it
Short answer	One line of text.	Fill this in to continue.	No
Long answer	A paragraph.	Fill this in to continue.	No
Email	An email address. Common typos get a suggestion: "Did you mean …?"	Enter your email address. That doesn't look like an email.	No
Phone	A phone number. North American numbers are tidied as they're entered.	Enter a phone number with its area code.	No
Number	A number, with an optional unit beside it, like square feet.	Enter a number.	Yes, as the number
Single choice	One of a list of options.	Pick one to continue.	Yes, as the picked option's price
Multiple choice	Any number of options.	Pick at least one to continue.	Yes, as the sum of the picked options' prices
Dropdown	One option, from a menu that starts at "Choose one".	Pick one to continue.	Yes, as the picked option's price
Rating	One to five.	Pick one to continue.	Yes, as the rating
Yes or no	Yes or No.	Pick one to continue.	Yes, as 1 or 0, and in if … then … else
Date	A date.	Pick a date to continue.	No
File upload	One file, up to 10 MB.	Add a file to continue. That file is over 10 MB.	No
Signup slots	One slot, each with room for a set number of people. Respondents see how many spots are left.	Pick one to continue. That slot just filled up. Pick another.	No

Headings, text and dividers

Headings, paragraphs of text and dividers ask nothing. Use them to break a long form into parts or to explain something before the questions that need it.

The estimate block

One more block, at most one per form: a live price worked out from the answers above it. It has its own page: The estimate block and formulas.

Checking answers as people type

Answers are checked when someone leaves a question, not while they're typing, and a question that's merely empty waits until they press Send my answers. Problems show under the question itself, never in a banner at the top.