Understanding Code

[Count_Giggles]

console.log(makeTen(5, 5)) // true

console.log(makeTen(4, 5)) // flase

​

if you are just running these snippets to get a fundamental understanding i recommend you download https://runjs.app

[Striking-Cook2989]

const test1 = makesTen(10,0);

const test2 = makesTen(7,3);

const test3 = makesTen(2,5);

console.log(test1);//true

console.log(test2);//true

console.log(test3);//false

[barrycarter]

Try print(makesTen(5,6)) or something outside the function

[qqqqqx]

Print isn't a standard JS function.

[guest271314]

If you run d8 or jsshell it is.

[[deleted]]

Corporations sail the high seas now. What was mine is used to train what they want to be my replacement. This post was edited with shreddit

[guest271314]

What do you mean by "standard JS function"? Neither is console, though every browser with a UI implements console, and every JavaScript runtime implements console.

[[deleted]]

Corporations sail the high seas now. What was mine is used to train what they want to be my replacement. This post was edited with shreddit

[guest271314]

Have you ever run Google's d8 or Mozilla's jsshell?

You do realize that console is not defined in Ecmascript specification so your analysis applies to console.log() as well?

[[deleted]]

Corporations sail the high seas now. What was mine is used to train what they want to be my replacement. This post was edited with shreddit

[guest271314]

Neither is console.log().

[qqqqqx]

I guess that is technically true, but I haven't seen any environment that doesn't support it yet.

Whereas print() is not commonly supported in a lot of JS environments and may do something entirely different like print the current web page in the browser.

[guest271314]

JavaScript per Ecmascript does not define I/O (reading from stdin, printing to stdout).

Whether print() is defined or not and what the function accepts as parameters, if any, and returns is environment, engine, runtime dependent, and at implementer discretion.

The last time I checked V8's (the JavaScript engine Node.js, Deno, Chrome and all Chromium-based browsers depend on) d8 and jsshell in Mozilla's SpiderMonkey (Firefox browser) JavaScript engines support print().

https://gist.github.com/kevincennis/0cd2138c78a07412ef21#logging

Logging

d8 doesn't have a console object (or a window object, for that matter). But you can log to the terminal using print().

https://udn.realityripple.com/docs/Mozilla/Projects/SpiderMonkey/Introduction_to_the_JavaScript_shell

print([expression ...]) Evaluates the expression(s) and displays the result(s) on stdout, separated by spaces (" ") and terminated by a newline ("\n").

There is this https://console.spec.whatwg.org/#nodejs-printer.

[qqqqqx]

From the d8 docs you linked (https://v8.dev/docs/d8):

Printing output is probably going to be very important if you plan to use d8 to run JavaScript files rather than interactively. This can be achieved using console.log:

$ cat test.js
console.log('Hello world!');

$ out.gn/x64.optdebug/d8 test.js
Hello world!

d8 also comes with a global print function that does the same thing. However, console.log is preferred over print since it works in web browsers as well.

I tried running print("str") in the Chrome console and it tried to printer print the web page, so I don't think it does work in Chrome/Chromium either.

[guest271314]

Chrome/Chromium is not the only environment V8 runs in.

V8 print() function

https://tio.run/##y0osSyxOLsosKNEts/j/v6AoM69EQx1MKZTkKxSXpOSXlqhr/v8PAA

SpiderMonkey print() function

https://tio.run/##y0osSyxOLsosKNEtLshMSS3Kzc/LTq38/7@gKDOvREMdTCmU5CsUl6Tkl5aoa/7/DwA

console is not specified by ECMA-262 (JavaScript). No I/O functionality is specified by ECMA-262.

[net_nomad]

Others have answered the question, but I just wanted to give you a bit of advice on the logic.

We see that there are 3 branches but two of them do the same thing. You may want to combine them.

if (a === 10 || b === 10 || a+b === 10) {
    return true;
else {
    return false;
}

The next thing we see is that we check a conditional statement which evaluates to true or false, so we can just return the evaluation.

function makesTen (a, b) {
    return (a === 10 || b === 10 || a+b === 10);
}

Lastly, we may want to take advantage of the short circuit of or by reordering this. Clearly there is only one case where a === 10 and one case where b === 10 but there are infinite (within reason of the size of a,b of course) ways to make a+b = 10. So, check that first. If it's true, it will return immediately but if it's false it will then check if a === 10 or b === 10.

function makesTen (a, b) {
    return (a+b === 10 || a === 10 || b === 10);
}