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► KB ► To/From Guides ► C# ► Statements

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Cross Ref > Statements

By Mike Prestwood

C# versus JavaScript: A side by side comparison between C# and JavaScript.

Statements

Common statements such as if statements, loops, etc.

Exception Trapping

[Other Languages]

Languages Focus

A common usage of exception handling is to obtain and use resources in a "try-it" block, deal with any exceptions in an "exceptions" block, and release the resources in some kind of "final" block which executes whether or not any exceptions are trapped.

C#: try...catch...finally

C# uses a try...catch...finally statement to trap for errors.

try {}

catch {}

finally {}

Syntax Example:

try
{
  int y = 0;
  y = 1 / y;
}
catch
{
  MessageBox.Show("you cannot divide by zero");
}

C# Exception Trapping (try...catch...finally)

JavaScript: try/catch/finally

See "throw" to raise (throw) an error.

Syntax Example:

try {

  //Do something.

catch(e) {        //one or more.

  //Do something.

finally {         //0 or one.

  //Do something.

If Statement

[Other Languages]

C#: if..else if..else

Use () around evaluation with no "then".

Syntax Example:

Boolean x = true;



if (x)
{
  MessageBox.Show("hello");
}
else if (x==false)
{
  MessageBox.Show("goodbye");
}

else

  MessageBox.Show("what?");
}

JavaScript: if..else if..else

Same as C/C++ but, as usual, the semicolons are optional.

Syntax Example:

var x = 8;

if (x == 10) {
 document.write("x is 10.");
} else if (x < 10) {
 document.write("x is less than 10.");  
} else {
 document.write("x must be greater than 10."); 
}