C# program to count upper and lower case characters in a given string

To count uppercase characters in a string, check the following condition −

myStr[i]>='A' &amp;&amp; myStr[i]<='Z'

To count lower case characters in a string, check the following condition −

myStr[i]>='a' &amp;&amp; myStr[i]<='z'

Example

You can try to run the following code to count upper and lower case characters in a given string.

Live Demo

using System; public class Demo {    public static void Main() {       string myStr;       int i, len, lower_case, upper_case;       myStr = "Hello";       Console.Write("String: "+myStr);       lower_case = 0;       upper_case = 0;       len = myStr.Length;       for(i=0; i<len; i++) {          if(myStr[i]>='a' &amp;&amp; myStr[i]<='z') {             lower_case++;          } else if(myStr[i]>='A' &amp;&amp; myStr[i]<='Z') {             upper_case++;          }       }       Console.Write("
Characters in lowecase: {0}
", lower_case);       Console.Write("Characters in uppercase: {0}

", upper_case);    } }

Output

String: Hello Characters in lowecase: 4 Characters in uppercase: 1