C# start with uppercase letter & ends with punctuation mark

Raymond Highers

11y2.4k

In C# Visual Studio 2012, write a method(s) for a sentence to check whether the first letter is uppercase and ends with a punctuation mark

5 Replies

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Priyaranjan K S11y ago
Accepted answer
Hi Raymond ,

You may try out the below code :
string teststring="ello world";
char firstChar=teststring[0];
char lastCharacter=teststring[teststring.Length-1];
if( char.IsUpper(firstChar) && char.IsPunctuation(lastCharacter) )
{

Console.WriteLine("First character is Upper & Last Character is Punctuation");
}
else if (!char.IsUpper(firstChar) && char.IsPunctuation(lastCharacter) )
{
Console.WriteLine("First character is NOT Upper & Last Character is Punctuation");
}
else if (char.IsUpper(firstChar) && ! char.IsPunctuation(lastCharacter) )
{
Console.WriteLine("First character is Upper & Last Character is NOT a Punctuation");
}
else{
Console.WriteLine("First character is NOT Upper & Last Character is NOT a Punctuation");

}
Output : First character is NOT Upper & Last Character is NOT a Punctuation

Here I have tested it in a Console . If you are using a Forms Application You can replace Console.WriteLine with MessageBox.Show .Also teststring can be replaced with you texbox value .

Thanks,
Priyan

If you found this useful Please Accept this as Answer
+2
Priyaranjan K S11y ago
Ray,

You can enclose the core logic inside the IF statement that checks if the statement is empty . Only if it is not empty ,Process the statement .

string teststring="";
if(teststring!=string.Empty)
{
char firstChar=teststring[0];
char lastCharacter=teststring[teststring.Length-1];
if( char.IsUpper(firstChar) && char.IsPunctuation(lastCharacter) )
{
Console.WriteLine("First character is Upper & Last Character is Punctuation");
}
else if (!char.IsUpper(firstChar) && char.IsPunctuation(lastCharacter) )
{
Console.WriteLine("First character is NOT Upper & Last Character is Punctuation");
}
else if (char.IsUpper(firstChar) && ! char.IsPunctuation(lastCharacter) )
{
Console.WriteLine("First character is Upper & Last Character is NOT a Punctuation");
}
else{
Console.WriteLine("First character is NOT Upper & Last Character is NOT a Punctuation");
}
}
else{
Console.WriteLine("The sentence is Empty");

}

Thanks,
Priyan
+1
Raymond Highers11y ago
Thanks! That got me through the bulk of the problem. Now I need the Visual Studio 2012 C# code for when the button click event is clicked and there's nothing in the textbox, that I am supposed to give an answer in my label "Please enter a sentence."
Can you help me with this as well, or others can chime in.
Ray
+1
Raymond Highers11y ago
Thanks for the quick reply, but that doesn't help me.
I need the C# code to write a method that checks a sentence from a textbox for the first letter to be uppercased and end with a punctuation mark. That could be a period ("."), or a question mark ("?"), or an exclamation mark ("!"). I know that a "char.IsUpper(string, index)" is used and "char.IsPunctuation(string, index)" is used.
Can anybody please help me with this?

Ray
0
Mukesh Kumar11y ago
Hi,

You can create regex to check first letter as caps and last with punctuation mark.

Refer this link to create different types of regex.

https://msdn.microsoft.com/en-us/library/20bw873z(v=vs.110).aspx

thanks
+1