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Yehuda Shiran May 1, 2002
JScript .NET's var Requirement
Tips: May 2002

Yehuda Shiran, Ph.D.
Doc JavaScript

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 JavaScript does not enforce any data-typing. It has a very forgiving type system. You can assign a number to a variable in one line and assign a string to the same variable on the next line. JScript .NET is identical to JavaScript in this respect: variables can be un-typed. JScript .NET is different from JavaScript in that it requires the declaration of variables (with var), while JavaScript does not. This is valid JavaScript code:

  a = 4;
  a = "four";
That code will not compile in JScript .NET because of the missing var declaration:

  var a;
  a = 4;
  a = "four";
To learn more on JScript .NET, go to Column 108, JScript .NET, Part II: Major Features.

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