Arma 3 supports "simple expressions" which are used in configs quite a lot. Unfortunately, the getNumber command cannot evaluate them. So I would like to request a command that does this.

variables evaluateSimpleExpression STRING or CONFIG

which evaluates a simple expression either from the string form or from the text config entry.

Example:

[["x", 1], ["y", 2]] evaluateSimpleExpression "pow(x + 1, y)"

if a variable is undefined, no error should be produced and the variable should be set to 0:

[] evaluateSimpleExpression "x + y" // should return 0 without any errors