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ExpressionScript sample surveys/142/en

From LimeSurvey Manual

This is Group0, which uses the Equation question type to select random values from 1 to 6 for each group (except the last group, which has only 4 questions). Note that the "if()" function first checks whether ask1 has already been set, and if so, uses that value. If the value hasn't been set, then it uses a random value to set the value of ask1.