If a variable is not within a function, an if block, or a loop, the variable is global in scope.ĥ) What data types does JavaScript support? Because of this, the distinction between global and local variables becomes more sharply defined. In modern JavaScript, “var” has been replaced with the keyword “let”. In older versions of JavaScript, you declared a variable using the keyword “var”. Local variables are temporary variables that only have a scope within the function that generated them and have “local scope.” By definition, a global variable can be accessed from anywhere within the program and have “global scope” or global visibility within the program. In modern JavaScript, the designations of global and local variables have become more exact. Span as many lines as you’d like.*/ 4) Are there still local and global variables? You can add either line comments or block comments to JavaScript. 3) How do you add comments to JavaScript? You can also link in to the HTML file, like in this example: You can embed JavaScript directly into a web page using script tags, like the example below:
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