Expressions

Expression is something that has some value (variable, constant) or returns some value as result of function call (e.g., Func(a b)) or calculation with operators (e.g., a + b).

You can assign expressions to variables (variable = expression), return from functions (ret expression), use expresions as arguments (parts) of functions, commands or other expressions, etc. Expressions that contain operators and spaces must be enclosed in parentheses when passing to a function.

Examples:

a = 10
b = a
s = "string"
a = b + (c * 5) - 1
def C5 (c * 5)
a = b + C5 - 1
a = Func(b c)
a = Func2(b 1.5 (c + 1) Func(d 10) s)
a = Func2(b 1.5 c+1 Func(d 10) s)
ret a + 10
out Func(a b)

Here a, b, c, d and s are variables; Func and Func2 are functions.