// "DEL" Button
private void C_Button_Click(object sender, EventArgs e)
{
// if condition
if (Principal.Text.Length > 1)
{
Principal.Text = Principal.Text.Remove(Principal.Text.Length - 1, 1);
}
// else
else
{
Principal.Clear(); // Empty / Clear the TextBox
}
}
// "-" Button
private void Sust_Button_Click(object sender, EventArgs e)
{
operation = "-";
num1 = Convert.ToDouble(Principal.Text);
Principal.Clear();
}
// "10x" Button
private void Tentox_Button_Click(object sender, EventArgs e)
{
operation = "10x";
Principal.Clear();
}