Eval(<expression>)

Eval is used to find the value of an expression during a concatenation of strings.

Example:

test = 'Blah: ' + Eval(6.6+1.1)  ; this will produce "Blah: 7.700000"
test2 = 'Blah: ' + 6.6 + 1.1 ; this will produce "Blah: 6.61.1"