Below are some examples of expressions that come up regularly when running surveys.
| When this is used | |
| $answer eq 'this' or $answer eq 'that' or $answer eq 'the other' | When applied as a condition to a branch when you want to branch if the answer is this, that or the other |
| How would you describe the working conditions at $company_name | When used with PIPE in question text, the value of the company_name variable will appear |
| !($age>=18 and $age<=65) | Checks the age range of a respondent and evaluates to true if the age is outside of the working age. This is equivalent to $age65 |
| $account_number=~/^[0-9]+$/ | True if $account_number is a string of digits only |
| $account_number=~/^[1-9][0-9]*$/ | True if $account_number is a string of digits only with a non-zero start |
| $email_address=~/@/ | True if the entry has a @ in it. |
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