Question

1_ What is the output?

private void btnMethods_Click(object sender, EventArgs e)

{

int arg1 = 2;

double val = ValReturnMethod(arg1, 2.00);

MessageBox.Show(val.ToString());

}

private void ValReturnMethod(int val, double val2)

{

return val1 * val2 *25.50;

}

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2_ What is the output?

private void btnMethods_Click(object sender, EventArgs e)

{

int arg1 = 4;

double val = ValReturnMethod(ref arg1);

MessageBox.Show(arg1.ToString());

}

private double ValReturnMethod(ref int val1)

{

return val1 *25.50;

}

______________________________

3_ What is the output?

private void btnMethods_Click(object sender, EventArgs e)

{

int arg1 = 4;

double arg2 = 10.50;

MessageBox.Show(ValReturnMethod(arg1,arg2).ToString());

}

private double ValReturnMthod (int val1,double val2)

{

return val1 * 25.50;

}

Answer 1

1_ What is the output?
private void btnMethods_Click(object sender, EventArgs e)
{
int arg1 = 2;
double val = ValReturnMethod(arg1, 2.00);
MessageBox.Show(val.ToString());
}
private void ValReturnMethod(int val, double val2)
{
return val1 * val2 *25.50;   //This is trying to return a value from a void method, which leads to error.
                           //Also there is a typo. The variable val1 is used here, where it is declared as val.
}
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2_ What is the output?
private void btnMethods_Click(object sender, EventArgs e)
{
int arg1 = 4;
double val = ValReturnMethod(ref arg1);   //val1 is assigned with 102.
MessageBox.Show(arg1.ToString());   //And 102 will be printed to MessageBox.
}
private double ValReturnMethod(ref int val1)
{
return val1 *25.50;   //val1 = 4 is taken as input. And returns 4 * 25.50 = 102.
}
______________________________
3_ What is the output?
private void btnMethods_Click(object sender, EventArgs e)
{
int arg1 = 4;
double arg2 = 10.50;
MessageBox.Show(ValReturnMethod(arg1,arg2).ToString());       //Calling a method that doesn't exist.
                                                           //Note there is a typo in the other method. ValReturnMthod.
                                                           //If not that, this will also return 102.
}
private double ValReturnMthod (int val1,double val2)  
{
return val1 * 25.50;   //Returns 4 * 25.50
}