JavaScript Tutorial for Beginners - Part 5 | JavaScript Syntax | Learn Web Technologies

Web Reference: Novice JavaScript developers need to know that the "not not" operator is using implicitly the original loose comparison method instead of the exact or operators and also the hidden cast operation that is happening behind the scenes and I show it in the example I provide. Related to Is there a "null coalescing" operator in JavaScript? - JavaScript now has a ?? operator which I see in use more frequently. Previously most JavaScript code used ||. let userAge = Dec 11, 2008 · I'm using JSLint to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like comparing idSele_UNVEHtype.value.

YouTube Excerpt: CSS Playlist https://www.youtube.com/playlist?list=PLjD5_XPKqoPgpyNne2IbH9c9204pF-TWe HTML Playlist https://www.youtube.com/playlist?list=PLjD5_XPKqoPhh7RTQ9O787szFNfhkZOxy Sign up for my newsletter to receive weekly updates http://bit.ly/2RRFktj Join our facebook page bit.ly/2OKQYV7 JavaScript Syntax JavaScript syntax is the set of rules, how JavaScript programs are constructed: JavaScript Values The JavaScript syntax defines two types of values: Fixed values and variable values. Fixed values are called literals. Variable values are called variables. JavaScript Literals The most important rules for writing fixed values are: Numbers are written with or without decimals: Strings are text, written within double or single quotes: JavaScript Variables In a programming language, variables are used to store data values. JavaScript uses the var keyword to declare variables. An equal sign is used to assign values to variables. JavaScript Operators JavaScript uses arithmetic operators ( + - * / ) to compute values: JavaScript Expressions An expression is a combination of values, variables, and operators, which computes to a value The computation is called an evaluation. JavaScript Keywords JavaScript keywords are used to identify actions to be performed. The var keyword tells the browser to create variables: JavaScript Identifiers Identifiers are names. In JavaScript, identifiers are used to name variables (and keywords, and functions, and labels). The rules for legal names are much the same in most programming languages. In JavaScript, the first character must be a letter, or an underscore (_), or a dollar sign ($). Subsequent characters may be letters, digits, underscores, or dollar signs. Numbers are not allowed as the first character. This way JavaScript can easily distinguish identifiers from numbers. ---------------------------------------------------------------------------------------------------------------- #LearnWebTechnologies #Javascript #JavascriptTutorialForBeginners #JavascriptPlaylist

CSS Playlist https://www.youtube.com/playlist?list=PLjD5_XPKqoPgpyNne2IbH9c9204pF-TWe HTML...

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