The aim of this code is to repeat the question "Please enter your name" if the user does not input any data. However I am having trouble with making this work with the if statement.
while (true)
{
Console.WriteLine("Please enter your name:");
string line = Console.ReadLine();
if (line=String.empty) //I'm having difficulty making this a valid statement
Console.WriteLine("Your entry was blank");
else break;
}
line=String.empty is an assignment, using the assignment (=) operator. It assigns string.Empty to line.
You should be using the comparison operator ==.
Better yet, look at the string.IsNullOrWhitespace method (.NET 4.0+), or string.IsNullOrEmpty.
Just change your if clause to if(line == "") and things should be just fine.
= is the assignment operator and you want to compare the values, therefore you should use the == comparison operator.
As looking your code, the error is in using making condition....You are using assignment operator(=) instead of comparision operator(==)......So do like this :
if (line == String.Empty)
{
//Put your code
}
Or,You can simply do like this:
if (string.IsNullOrEmpty(line))
Console.WriteLine("Your entry was blank");
Or, you can use string.IsNullOrWhitespace as Oded answer specified but it is only available in .NET 4 or above.....
