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/*

Quite soon we’re going to learn functions (a way to group commands), so let’s note in advance that "use strict" can be put at the beginning of a function. Doing that enables strict mode in that function only. But usually people use it for the whole script.

*/

// Ensure that “use strict” is at the top

"use strict";

var a = 12;

var b = 13;

console.log(a + b);