Variable declarations

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irScript variables are declared using the var keyword; as an implicitly-typed language, irScript does not allow declaration using a static type.

Declarations are often combined with value assignments, but this is not required. Solitary declarations implicitly assign the value null to the declared identifier.

Some examples:

var x;

var isNull = x == null;           // isNull == true

var y = null, a, b = [];

isNull = y == null; // isNull == true

isNull = a == null; // isNull == true

isNull = b == null; // isNull = false

var z = 'Fred';

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