Entry Validation
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Beside checking if a value has been entered in a field you may also setup more advanced rules using regular expression to make sure that the text entered by the respondent matches certain conditions.
You may also set the maximum length of characters allowed to be entered in your field.
Name
is the display name of the regular expression.
Regular expression
is the actual regular expression pattern that will be used to match the respondent answer .
Error message
error message that will be shown to the respondent if its entry doesn't match the pattern.
Built in
let us share the regular expression with all the other users.
Advanced users may also create a custom field based using to validate the respondent entries.
A (regex) is a string based search pattern that will check that the text entered by the respondent matches the expression pattern or not.
Using these patterns you check a value using patterns like emails, numbers, zip codes etc ... Almost any based type can be validated against a regular expression created using the regular expression editor.
To add a regular expression go to the page and click on the + icon
You may find pre-made regular expression and test yours at