How to read characters of string or character array without using length function

Question

I want to read all the characters from the string without using the built in functions.I tried the below.

        char[] str ={ 'k','r','i','s'};            
        for ( int i = 0; str[i]!='\0'; i++)
        {
            Console.WriteLine(str[i]);
        }

But I get an exception because unlike in c I don't see the string here ends with a null character. Is there any other way (apart from using built functions/try catch block in case of exception) I can read all the characters of the string ?

A char array is not a string. A string is a string. And strings in C# are not null terminated. And Length is not a function, and it is O(1) to compute, not O(n). I suspect you are a C programmer; remember, C# is a different language. — Eric Lippert
– Eric Lippert, Commented Jul 14, 2013 at 15:02
@Eric: How is it "not a function"? It's a property getter method, which will be inlined, but it's still a method. — Ben Voigt
– Ben Voigt, Commented Jul 14, 2013 at 15:10
@BenVoigt: array lengths are generated using the ldlen instruction, not a method invocation. — Eric Lippert
– Eric Lippert, Commented Jul 14, 2013 at 16:25

Zbigniew · Accepted Answer · 2013-07-14 15:02:16Z

3

In c# arrays have Length property:

char[] str ={ 'k','r','i','s'};            
for (int i = 0; i < str.Length; i++)
{
    Console.WriteLine(str[i]);
}

Otherwise you can use foreach which will enumerate all characters in an array.

answered Jul 14, 2013 at 15:02

Zbigniew

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2 Comments

Rohit Vats Over a year ago

Shouldn't it be i < str.Length.. ?

Zbigniew Over a year ago

Yeah, forgot it; Thanks!

terrybozzio · Accepted Answer · 2013-07-14 15:26:26Z

0

If what you really want is to display the string that the characters in the char array produce:

char[] mychars = { 'k', 'r', 'i', 's' };
Console.WriteLine("Your characters form the following string: " + new string(mychars));

answered Jul 14, 2013 at 15:26

terrybozzio

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