XCX 3.0 Variables and Constants

Variable Declarations

Variables are declared using the type: name = value; syntax.

i: age = 25;
f: pi = 3.14159;
s: name = "XCX";
b: is_ready = true;

Variables can also be declared without an initial value, in which case they take the default value for their type (e.g., 0 for i, "" for s).

Reassignment

Once declared, variables can be reassigned using the = operator.

i: count = 0;
count = count + 1;

Constants

Constants are declared using the const keyword. They must be initialized at declaration and cannot be changed afterwards.

const i: MAX_CONNECTIONS = 1024;
const s: VERSION = "2.0.0";

No Variable Shadowing

XCX does not support variable shadowing. Declaring a variable with the same name in any scope — including a nested block — is a compile-time error (RedefinedVariable).

i: x = 10;
if (true) then;
    i: x = 20;   --- COMPILE ERROR: RedefinedVariable
end;

If you need to change a value inside a block, use reassignment instead of redeclaration:

i: x = 10;
if (true) then;
    x = 20;      --- OK: reassignment to existing variable
    >! x;        --- 20
end;
>! x;            --- 20 (the global variable was modified)