CODEWITHSUNDEEP
c#for-loopiteration
user3323694
user3323694

Reputation:

how do I return back after catching an error?

for (int loopCount = 0; loopCount < 9; loopCount++)
{
    Console.WriteLine("Employee #" + (loopCount + 1) + " first name: ");
    fullName[loopCount, 0] = Console.ReadLine().ToLower();
    // first name
    if (fullName[loopCount, 0].Length == 0)
    {
        giveError();
        // nothing typed warning               
    }
    Console.WriteLine("Employee #" + (loopCount + 1) + " second name: ");
    fullName[0, loopCount] = Console.ReadLine().ToLower();
    // second name
}

How do I return back to adding a first name if the user enters nothing without moving on to the next loop?

Upvotes: 0

Views: 83

Answers (4)

Jonesopolis
Jonesopolis

Reputation: 25370

Assuming fullName is a string[9,2]:

for (int loopCount = 0; loopCount < 9; loopCount++)
{
   Console.WriteLine("Employee #" + (loopCount + 1) + " first name: ");

   fullName[loopCount, 0] = Console.ReadLine().ToLower();
   while(fullName[loopCount, 0].Length == 0)
   {
       Console.WriteLine("Bad Input, Retry");
       fullName[loopCount, 0] = Console.ReadLine().ToLower();
   }
}

It's worth the extra input line before the loop, so that if the loop is needed (i.e. bad input is received) you can supply a "bad input" message.

for your second name, you want fullName[loopCount,1], not fullName[0,loopCount]

Upvotes: 0

Mike Burdick
Mike Burdick

Reputation: 838

Wrap your logic around a do while loop:

string name = null;

do
{
  // Read input from user

}
while(!IsLegal(name));

Upvotes: 4

James C. Taylor IV
James C. Taylor IV

Reputation: 609

Without changing your loop structure, you can add the following lines after giveError(); inside you if statment:

loopcount--;
continue;

This will decrement your loopcount, so you do not loose your place and will return your program to the top of the loop and then re-increment loopcount.

Upvotes: 0

yoozer8
yoozer8

Reputation: 7489

You can initialize an empty value before you ask for input, and then wrap the input code in a while loop that continues asking until a valid value is given:

string fullname = string.Empty;
while(string.IsNullOrEmpty(fullname))
{
    fullname = Console.ReadLine().ToLower();
}
fullName[loopCount, 0] = fullname;

This way, if the user doesn't type anything, you'll just loop back and ask again.

Upvotes: 0

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