How to find max value a internal variable

My variable name is var1. It has 3 values. How to find the max value. Give me a command. Thank you so much

the max value of what? The max value you can store in a variable in general in Kantu? Values are generally stored as strings in kantu variable unless you use a javascript and assign a javascript integer value to the Kantu Variable. Then you can use that variable as a number.