mrvaskokurko mrvaskokurko - 17 days ago 4
Javascript Question

What does != mean in JavaScript?

I am mainly trying to figure out what this function is trying to say. For the most part I understand that the function is checking the variables and seeing if they are indeed variables. But what does != say in the script?

function fun2() {
var output = "";

if (typeof myGlobal != "undefined") {
output += "myGlobal: " + myGlobal;
}

if (typeof oopsGlobal != "undefined") {
output += " oopsGlobal: " + oopsGlobal;
}

console.log(output);
}

Answer

The operator != means if is different for example red != blue it return true, you can check the documentation of expressions and operators here: Comparison_operators Dev Mozilla JS

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