What is the difference between var x=1 and x = 1 in NodeJs

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What is the purpose of the var keyword and when should I use it (or omit it)? 18 answers

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'var x = 3' will create a variable within the current scope. Given this is declared in a function, x will not be available outside it, unless explicitly returned.

'x = 3' will create a variable within the global scope. Thus, any other code can access and alter its value. It's generally a bad practice to use variables in a global scope.

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