[C#] How do I use logical operators on strings acting on numbers?

[dialgarocksful]

if (!((name[x] >= 'A' && name[x] <= 'Z') || (name[x] >= 'a' && name[x] <= 'z') || (name[x] == ' ') || (name >= '1'))) 

I have this condition. It does work without name >= '1', but when I put it back, it gives me this:

 

CS0019: Operator '>=' cannot be applied to operands of type 'string' and 'char'

 

 

name is type string, used on an array, to check character per character content

[prolemur]

So you are comparing the string's length to be greater or equal to one, not an empty string?

[EpicAdom]

if (!((name[x] >= 'A' && name[x] <= 'Z') || (name[x] >= 'a' && name[x] <= 'z') || (name[x] == ' ') || (name >= '1'))) 

I have this condition. It does work without name >= '1', but when I put it back, it gives me this:

 

CS0019: Operator '>=' cannot be applied to operands of type 'string' and 'char'

 

 

name is type string, used on an array, to check character per character content

 

https://msdn.microsoft.com/en-us/library/system.string.length(v=vs.110).aspx

 

Edit: Here's some example code

namespace Test{    class Program    {        static void Main(string[] args)        {            string x = "bananas";            Console.WriteLine(x.Length);            if (x.Length > 5)            {                // do stuff if length of string is greater than 5                Console.WriteLine("The string has a length greater than 5.");            }        }    }}

[Mkfish]

The problem is you are using apostrophes instead of quotation marks.

 

'a' denotes a char

"a" denotes a string

 

Check out string.Compare() for the rest of your method

 

Also you can only apply >= or <= operators to numbers you can't compare strings using those operators

 

https://msdn.microsoft.com/en-us/library/hx063734.aspx

[dialgarocksful]

So you are comparing the string's length to be greater or equal to one, not an empty string?

 

 

 

https://msdn.microsoft.com/en-us/library/system.string.length(v=vs.110).aspx

 

Edit: Here's some example code

-snip-

supposedly, comparing the string's index content to be greater or equal to one. 

 

Here's an example:

 

User's input is Qwert1 Yu

 

without the name >= '1', the condition would terminate. but since I added name >= '1', it wouldn't

[prolemur]

supposedly, comparing the string's index content to be greater or equal to one. 

 

Here's an example:

 

User's input is Qwert1 Yu

 

without the name >= '1', the condition would terminate. but since I added name >= '1', it wouldn't

Ya but what are you checking to be >= '1' and why? I need more information to help. Is it the length of the string being longer or equal to one character or the unicode values being greater than 1 in unicode which is just 31?

[dialgarocksful]

Ya but what are you checking to be >= '1' and why? I need more information to help. Is it the length of the string being longer or equal to one character or the unicode values being greater than 1 in unicode which is just 31?

it's the content of the string array. if name[x] would result to a number, the if condition will terminate.

Qwer1 Yname[0] = Q // Not terminatename[1] = w // not terminatename[2] = e // not terminatename[3] = r // not terminatename[4] = 1 // terminate herename[5] = space // skipsname[6] = Y // skips

[PlutoNZL]

You're not checking that a character in the string is >= '1', you are checking that the entire string is >= '1'.

Do you mean to do name[x] >= '1'?

[Sauron]

You're missing the .Length extension when you compare your string to 1. A string can only be compared to other strings, so depending on how c# does things (can't remember for sure) with that syntax it will either check if the string is '1' or it will simply give an error (seems to be the latter). string.Length on the other hand is an integer and can be safely compared with another integer (meaning you need to remove the " ' "s). The other comparisons seem correct, provided your intention is to compare the xth character to 'A', 'Z' etc.

[dialgarocksful]

You're missing the .Length extension when you compare your string to 1. A string can only be compared to other strings, so depending on how c# does things (can't remember for sure) with that syntax it will either check if the string is '1' or it will simply give an error (seems to be the latter). string.Length on the other hand is an integer and can be safely compared with another integer (meaning you need to remove the " ' "s). The other comparisons seem correct, provided your intention is to compare the xth character to 'A', 'Z' etc.

I have that prior to the condition. the if condition is inside a for loop

for (int x = 0; x <= name.Length; x++)

[Sauron]

 

I have that prior to the condition. the if condition is inside a for loop

for (int x = 0; x <= name.Length; x++)

 

Yeah, I had imagined that and that part seems correct. If you use .Length and 1 instead of '1' you should be set.

[dialgarocksful]

Yeah, I had imagined that and that part seems correct. If you use .Length and 1 instead of '1' you should be set.

Thanks. Worked perfectly