Now, in this tutorial, I will show you how to create **MDAS calculator** in **C#**. MDAS are the *four fundamental operations* in the calculation which stand for *Multiplication, Division, Addition and Subtraction* that are very common to remember, sounds good right? So, if you want to create your own MDAS calculator? These easy steps below will guide you on how to do it.

## Let’s begin:

Open **Microsoft Visual Studio 2008** and create a new windows form application. After that, do the form as follows.

Go to the solution explorer, hit the “**code view**” to fire the code editor.

In the code editor, declare a variable to represent the total of the **MDAS**.

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double total = 0; |

Do the following codes for **Multiplication** methods.

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private void btnMultiply_Click(object sender, EventArgs e) { //set a formula for multiplication total = double.Parse (txtFinput.Text) * double.Parse (txtSinput.Text); //add the answer in the listbox lstOutput.Items.Add(double.Parse (txtFinput.Text) + " * " + double.Parse (txtSinput.Text) + " = " + total); } |

Do the following codes for **Division** methods.

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private void btnDivide_Click(object sender, EventArgs e) { //set a formula for Division total = double.Parse(txtFinput.Text) / double.Parse(txtSinput.Text); //add the answer in the listbox lstOutput.Items.Add(double.Parse(txtFinput.Text) + " / " + double.Parse(txtSinput.Text) + " = " + total); } |

Do the following codes for **Addition** methods.

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private void btnAdd_Click(object sender, EventArgs e) { //set a formula for addition total = double.Parse(txtFinput.Text) + double.Parse(txtSinput.Text); //add the answer in the listbox lstOutput.Items.Add(double.Parse(txtFinput.Text) + " + " + double.Parse(txtSinput.Text) + " = " + total); } |

Do the following codes for **Subtraction** methods.

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private void btnSubtract_Click(object sender, EventArgs e) { //set a formula for subtraction total = double.Parse(txtFinput.Text) - double.Parse(txtSinput.Text); //add the answer in the listbox lstOutput.Items.Add(double.Parse(txtFinput.Text) + " - " + double.Parse(txtSinput.Text) + " = " + total); } |

## Output:

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