For Example, using the Insert Text Action:
You can (v7.2+) access a variable as if it is a comma separated array of text using the notation %Variable%
<VariableName>% where 3 can be any Calculations. You can use a different item separator by putting the text between the ] and % characters, eg %Variable%
<VariableName>:%. Arrays are indexed starting from 1.
You can also use a short form of just %Variable Name% to include variables as long as the variable exists and has a value and there is no corresponding text token, although generally it is better and clearer to use the longer form %Variable%Variable Name%.