How to check if char is letter "A"||"B"||etc...

general
,
1

Hey to you all,
I have this loop that goes through a string and gets every letter and assigns it to a char.
I want to check if this char is an A or B or C or D, etc …
How do you check if the char is a specific letter?

Here is some code:

    String alpha = "ABSDROP";

	for (int i = 0; i< alpha.length(); i++) {
		char c = alpha.charAt(i);
		//System.out.println(c);
		if (c == "A"||"B"||"D") { //I don't get how to check this part???
			//do something...
		}
1 Like
2

String alpha = “ABSDROP”;

    for (int i = 0; i< alpha.length(); i++) {
        char c = alpha.charAt(i);
        //System.out.println(c);
        if (c == 'A'|| c=='B' || c=='D') {   
            //do something...
        }
1 Like
3

You can also use ASCII value of alphabets in the if condition. Another way of checking would be using switch case.

4

Thanks it was the single quotes. I used double ones.

5

You can also use switch case, such as:-

switch©

{

case ‘A’:
//do something

break;

case ‘B’://do something

break;

…etc.

}

6

try this if you’re using java:
if(Character.isLetter(char_variable))
{
System.out.println(char_variable+“is a alphabet!”);
}
else
{
System.out.println(char_variable+“is not a alphabet!”);
}

1 Like