In JavaScript when is it correct and cross-browser to use.
function sum(v1,v2) { return v1+v2;}
...
if(val = sum(1,2)) alert(val);
else alert('result zero or null');
...
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Of course you can. It works in many(or some – at least it doesn’t work in Python) program languages like PHP.
That’s why many programming beginners have trouble with
=and==.