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• Fun With Floating Point Arithmetic, Part Six

  One more thing -- I said earlier that the VBScript float-to-string algorithm was a little bit different than the JScript algorithm. We can demonstrate quite easily by comparing the outputs of two nigh-identical programs: ' VBScript print 9.2 * 100.0 < Read More... Posted Wednesday, January 26, 2005 1:02 PM by Eric Lippert | 4 Comments Filed under: JScript .NET, VBScript, Scripting, Floating Point Arithmetic

• Fun with Floating Point Arithmetic, Part Five

  I went to Joel Spolsky's geek dinner at Crossroads the other night, which was a lot of fun. I didn't get much of a chance to chat with Joel, as he was surrounded by a cadre of adoring fans three deep the whole time. I mostly hung out with KC and Larry Read More... Posted Thursday, January 20, 2005 10:56 AM by Eric Lippert | 10 Comments Filed under: JScript .NET, VBScript, Scripting, Floating Point Arithmetic

• Fun with Floating Point Arithmetic, Part Four

  A reader also asked the other day why it is that in VBScript, CSng(0.1) = CDbl(0.1) is False . Forget about binary floating point for a moment. Suppose that we had two fixed-point decimal systems, say one with five digits after the decimal place and one Read More... Posted Tuesday, January 18, 2005 11:07 AM by Eric Lippert | 7 Comments Filed under: VBScript, Scripting, Floating Point Arithmetic

• Fun With Floating Point Arithmetic, Part Three

  I've been getting lots of mail, questions and pointers to interesting articles on some of the trials and tribulations of using floating point arithmetic correctly. Please do keep it coming! Though I am certainly no expert in this area, I'm happy to take Read More... Posted Monday, January 17, 2005 1:54 PM by Eric Lippert | 2 Comments Filed under: JScript, VBScript, Scripting, Floating Point Arithmetic

• Bankers' Rounding

  A number of people have pointed out to me over the years that VBScript's Round function is a bit weird. It seems like it should be pretty straightforward -- you pick the integer closest to the number you've got, end of story. But what about, say, 1.5? There are two closest integers. Do you go up or down? Read More... Posted Friday, September 26, 2003 2:03 PM by Eric Lippert | 22 Comments Filed under: VBScript, Scripting, Floating Point Arithmetic

• Why does JScript have rounding errors?

  Try this in JScript: window.alert(9.2 * 100.0); You might expect to get 920, but in fact you get 919.9999999999999. What the heck is going on here? Read More... Posted Monday, September 15, 2003 1:41 PM by Eric Lippert | 7 Comments Filed under: JScript, VBScript, Scripting, Floating Point Arithmetic