Visual F# 100 Examples: Example Number 6

Posted by Rey Dacoco in

Problem. Create an application that will display the surface area of a cube. The surface area of a cube can be computed by multiplying the inputted side by itself and multiplying the product by 6.

// Learn more about F# at
//specifies the memory location of the class files
//that will be needed in our application
open System.Collections.Generic
open System
open System.Windows.Forms
open System.ComponentModel
open System.Drawing
//creates a new form
let cubeform=new Form(Text="Compute the Surface Area of a Cube", Size=new System.Drawing.Size(300, 200),StartPosition=FormStartPosition.CenterScreen,AutoScaleMode=AutoScaleMode.Font)
//creates our controls
let n1label=new Label(Text="Enter a side value:",Location=new System.Drawing.Point(0,20),AutoSize=true)
let firsttextbox=new TextBox(Location=new System.Drawing.Point(120, 20))
let n2label=new Label(Text="Surface area of a cube:", Location=new System.Drawing.Point(0, 90),AutoSize=true)
//creates a label that will display the result of the computation
let anslabel=new Label(Location=new System.Drawing.Point(140, 90), BorderStyle=BorderStyle.FixedSingle)
//make our buttons
let computebutton=new Button(Text="Compute", Location=new System.Drawing.Point(100, 130))
let exitbutton=new Button(Text="Exit", Location=new System.Drawing.Point(200, 130))
//add the controls into the form

//when the compute button is clicked
computebutton.Click.Add(fun ans->
let sidevalue=Convert.ToDouble(firsttextbox.Text)
let areaofacube=6.00*(sidevalue*sidevalue)

//display the areaofacube value in the anslabel
 //when the exit button is clicked, close the form            
exitbutton.Click.Add(fun exit -> cubeform.Close())  

We'll be adding some new controls after our tenth example:)


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