Logical operators: Logical operators in javascript, unlike operators in other programming languages, do not return true or false. They always return one of the operands.OR ( | | ) operator - If the first value is truthy, then the first value is returned. Otherwise, always the second value ...
There are six practice tests with preparation questions from all knowledge areas to prepare for theJSE-40-01exam at the JavaScript Institute. Every question has an explanation and aTry-It-Yourself-Code which you can run to better understand the topic. ...
Common JavaScript coding interview questions Some of the common JavaScript coding interview questions typically cover these topics: checking for palindrome, finding missing/largest numbers, object manipulation, removing duplicates, merging, etc.1. Write a function to check if a given string is a palin...
This is fine, since it counts as “true” in logical expressions, but also can be used to return that value when you care to do so. This explains why, somewhat surprisingly, 1 && 2 returns 2 (whereas you might it expect it to return true or 1)....
) provides more precise control over default values than the logical OR operator (||), only falling back when values are null or undefined. (Yes - only those two values. Nothing else!) // Old way with || const count = value || 0; // Falls back if value is false-y // With ...
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“We teach our learners block-based coding first because it’s first teaching the logical and problem-solving skills on how code should work,” says Kim. “And that seems to facilitate it, at least for our young learners. At Code Ninjas, the aim is to make coding as “fun as possible...
22 – Use logical AND/ OR for conditions varfoo =10; foo ==10&& doSomething();// is the same thing as if (foo == 10) doSomething();foo ==5|| doSomething();// is the same thing as if (foo != 5) doSomething();
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This will return the string "Both the x statement and the y statement are true". The reason for this is that if the first operand of the logical AND is false, there is no need to test the second one; so in the case where x is not less than 10, nothing will be displayed because...