In Velocity, you can declare a variable and set its value by using the #set directive, for example:
##String #set ($var = "abc") ##Boolean #set($var2 = true) ##Value #set($var3 = 10)
The above example shows that $var has a string value, $var2 has a Boolean value, and $var3 has a numerical value. The #set directive can also set an array to a declared Velocity variable. To assign an array to a variable type, for example:
#set($var = ["a", "b", "c"])