The LET statement allows you to assign a value to a variable. For the complete information on variables you can look here in the Reference Manual. Let's pull out your sample.hts file that we created before. Now save it as sample2.hts and upload it to your directory. Well this is only the tip of the iceberg.
Lets play with some things here.
There is more you can do with them, but will get to that further on. Lets try our hand at some thing new. Lets suppose you have a page that will show a warning if a person inputs a certain age. We'll worry about how you get the age a little later. For now we'll just type in the age ourselves.