What is the difference between compile time and runtime error

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C#

Can anyone provide an example which explains the difference between a compile time error and a runtime error?

Posted 14-Nov-11 20:33pm

syedkhaleel

Updated 14-Nov-11 20:41pm

André Kraak

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André Kraak 15-Nov-11 2:41am

DO NOT SHOUT when asking a question. When you use all capital letters it is seen as shouting on the Internet and considered rude. Next time when posting a question please use proper capitalization.

[no name] 15-Nov-11 2:54am

thanq for suggestins

3 solutions

Solution 1

Yes, sure, someone can; most of the members would be able to do that, I'm sure.
Is that what you wanted to know?

—SA

Posted 14-Nov-11 20:44pm

Sergey Alexandrovich Kryukov

Solution 3

On the first impression, I thought your are very beginner to Programming, but looking at your profile it does not seems to be true.

I think you should go back to basics.

http://en.wikipedia.org/wiki/Compiler

Posted 14-Nov-11 20:47pm

RaisKazi

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OriginalGriff · Accepted Answer · 2011-11-14T20:45:00

A compile time error is one which is detected before teh program starts running:

C#

int i = 17;
if (i - 5)
   {
   }

will cause a compilation error, because "i - 5" is not a boolean vlaue - it is integer - and if conditions must be bool in C#

A run time error is one that is only detected when the program runs:

C#

int i = 17;
int[] ar = new int[3];
ar[i] = 42;

will cause a run time error, because the value of i being used as an array index is outside the bounds of the array.

Run time errors can be trapped with a try...catch block, compile time errors cannot.