How to convert string into int?

Question

i have a doubt. May i know how to convert string to int.i know using parse we can do it. instead of parsing is there any thing to convert.

You could cast the string to an int. Show some code please, for people to understand why Parse or TryParse wouldn't be of use. — shahkalpesh
– shahkalpesh, Commented Jan 11, 2010 at 6:38
@silky: You are right. That is really stupid of me to write that. — shahkalpesh
– shahkalpesh, Commented Jan 11, 2010 at 6:56

Noon Silk · Accepted Answer · 2010-01-11 07:02:14Z

4

Well, no.

You can call

int k = Convert.ToInt32("32");

But it still parses it.

-- Edit:

For completeness, here is the code to do it without 'framework' functions:

    public static int ToInt32 (string s)
    {
        int result = 0;

        foreach(char c in s){
            if( c >= '0' && c <= '9' ){
                result = (result * 10) + (c - '0');
            }
        }

        if( s[0] == '-' ){
            result = -result;
        }

        return result;
    }

edited Jan 11, 2010 at 7:02

answered Jan 11, 2010 at 6:38

Noon Silk

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2 Comments

Surya sasidhar Over a year ago

Mr. Silky is there any thing i know this. thank you for response

Surya sasidhar Over a year ago

Thank you for response Mr. silky

Nate · Accepted Answer · 2010-01-11 06:48:06Z

0

Are you wanting to get the numerical value of the characters in the string? If so, you could cast individual characters to int to grab the unicode numbers. Other than that, it doesn't make much sense to not use int.Parse or int.TryParse.

public void PrintValues(string aString)
{
    foreach(char c in aString)
    {
        int x = (int)c;
        Console.WriteLine(x);
    }
}

answered Jan 11, 2010 at 6:48

Nate

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3 Comments

Surya sasidhar Over a year ago

I have a doubt Mr. Nate. you code is super is it concept of boxing and unboxing

Jon Skeet Over a year ago

No, that has nothing to do with boxing/unboxing.

Surya sasidhar Over a year ago

ok thank you Mr. Jon skeet i understood thank you for response

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