How to find string that doesn't start with empty space?

[MACE]

Hello to all,
I am second year Computer science student. I recently started learning c# language. In the last lecture our sir asked us one program like how to find string that doesn't start with empty space? None of us able to give write answers. Can anyone tell me how to find string that doesn't start with empty space? Please help me.
Thank you.

[Reegan]

You have to use ValidationExpression in your code to find string that doesn't start with empty space. It is very simple to do this. I have written following code for you. Just try to understand it. In the following code I have use "^" to find string.

string ValidationExpressions = @"/^[^ ]/";

if (!Stringss.IsNullOrEmptys(GroupsNamess) && !Regex.IsMatch(GroupsNames, ValidationExpressions))
{    
}

[opaper]

As per my information you have to use boolean data type in your code to find string that doesn't start with empty space. I have written small example of it. Just try to understand it. In the following code I have use s1string variable to store input taken from the user.

string s1string = " Welcome to this worild";   
bool isEmptysStarts = s1string.StartsWith(strings.Emptys);

[MindSpace]

I think you have to use following symbol in your code to find string that doesn't start with empty space. The "^" is used to find empty space.

/^[^ ]/

In above code "^" means "string starts with"
After that meaning of [^ ] is "one character that is not a space".
After that "//" means regex delimiter .

[Modifier]

You have to use Regex expression in your code to find string that doesn't start with empty space. It is very simple to do this. In the following code I have use object of regex expression to do this.

Regex rxs = new Regex(@"^\ss1+");

After this you have to write following code.

Match ms1 = rxs.Match("   ");  
  Match ms2 = rxs.Match("qwertyu  ");