How do I provide a condition with which the answer must comply?

You want to apply your own validation to a question. For instance, a code which starts with the same three digits as default. Or an answer must contain a capital letter between A to Z. This complex validation can be set with a regular expression. In Spotler forms, a regular expression can be set at the settings of a question. Double click on the question and click on Settings. You see Specific validation. Here you can set the regular expression.

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