List and describe at least two kinds of control statements P

List and describe at least two kinds of control statements? Provide examples and uses in VB & C# languages.

Solution

Two control statements in C# (for loop and if-the-else)

For

This loop is most useful when the number of iterations are known.

for (int idx = 0; idx < 5; idx++)
arr(idx) = \"apple\"

If-then-else

There are 3 forms of if-then-else statement:

// single selection
if (number > 0)
Console.WriteLine(\"{0} is positive\", number);

//if-then-else selection
if (number > 0)
Console.WriteLine(\"{0} is positive\", number);
else
Console.WriteLine(\"{0} is not positive\", number);

//multicase selection
if (number == 0)
Console.WriteLine(\"number is zero\");
else if (number > 0)
Console.WriteLine(\"{0} is positive\", number);
else
Console.WriteLine(\"{0} is negative\", number);

Two control statements in VB (for and while)

For

This loop is most useful when the number of iterations are known.

for (int idx = 0; idx < 5; idx++)
arr(idx) = \"apple\"

while

repeating a specific number of code until the guard condition is met

Dim product As Integer = 5

While product <= 1000
product = product * 2
End While

For..Next Loop

repeats=ing a group of code for a specified number of times mostly used when number of iterations are known.

start=1
end = 5
For var = start To end
show message
Next var