VBScript Coding Exercise – Compute PI using Monte Carlo Random Method

Monte-Carlo algorithm is a generalized method that can be used in many applications. It is a randomize approach. To  compute the mathematics constant , we can use the method that is based on the probability.

See more posts here, here and here.

The below is a quick coding exercise for VBScript, that runs on mainly windows platform e.g. Windows Scripting Host. VBScript (not VB) is one of my favourite programming language because of: simplicity and no installation required for windows (in bundle with most Windows versions).

Also, VBScript is highly frequent used in ASP (Server side), VBA (for Microsoft Office) etc.

Monte-Carlo Compute PI – VBScript Version

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' HelloACM.com rocks
' Monte-Carlo Compute PI - VBScript Version
 
Dim cnt: cnt = 0
Dim i, x, y
Const N = 1000000
 
Randomize 
For i = 1 To N
    x = Rnd
    y = Rnd
    If x * x + y * y <= 1.0 Then
        cnt = cnt + 1
    End If
Next
 
MsgBox "PI = " & (4.0 * cnt / N)

' HelloACM.com rocks
' Monte-Carlo Compute PI - VBScript Version

Dim cnt: cnt = 0
Dim i, x, y
Const N = 1000000

Randomize 
For i = 1 To N
	x = Rnd
	y = Rnd
	If x * x + y * y <= 1.0 Then
		cnt = cnt + 1
	End If
Next

MsgBox "PI = " & (4.0 * cnt / N)

Just save the above file in *.vbs and double click (interpreted using C:\windows\system32\cscript.exe, or wscript.exe, or the same files under C:\windows\syswow64, i.e. run 32-bit interpreter under 64-bit windows).

If everything goes well, you will see a messagebox pop up:

Monte Carlo Simulation Algorithms to compute the Pi based on Randomness:

• Teaching Kids Programming – Area and Circumferences of Circle and Monte Carlo Simulation Algorithm of PI
• Using Parallel For in Java to Compute PI using Monte Carlo Algorithm
• Monte Carlo solution for Mathematics × Programming Competition #7
• R Programming Tutorial – How to Compute PI using Monte Carlo in R?
• C++ Coding Exercise – Parallel For – Monte Carlo PI Calculation
• Area of the Shadow? – The Monte Carlo Solution in VBScript
• VBScript Coding Exercise – Compute PI using Monte Carlo Random Method
• Computing Approximate Value of PI using Monte Carlo in Python
• How does the 8-bit BASIC perform on Famicom Clone – Subor SB2000 – FBasic – Compute PI approximation using Monte-Carlo method
• GoLang: Compute the Math Pi Value via Monte Carlo Simulation
• BASH Script to Compute the Math.PI constant via Monte Carlo Simulation

–EOF (The Ultimate Computing & Technology Blog) —