how to get ascii value of string letter in java

To get the ASCII value of a letter in a String in Java, you can use the charAt() method of the String class to get the character at a specific index, and then cast it to an int to get its ASCII value.

Here's an example of how to get the ASCII value of a letter in a String in Java:

String s = "abcdef";
int asciiValue = (int) s.charAt(0);

System.out.println("The ASCII value of '" + s.charAt(0) + "' is: " + asciiValue); // The ASCII value of 'a' is: 97

In the above example, the charAt() method is used to get the character at index 0 of the Strings, which is the letter 'a'. The character is then cast to an int to get its ASCII value, which is 97.

You can also use a loop to get the ASCII values of all the letters in a String. For example:

for (int i = 0; i < s.length(); i++) {
    int asciiValue = (int) s.charAt(i);
    System.out.println("The ASCII value of '" + s.charAt(i) + "' is: " + asciiValue);
}

In this case, the for loop is used to iterate over the characters in the Strings, and the ASCII value of each character is printed to the console.

For more information on working with characters in Java, you can refer to the documentation for the char data type in the Java Language Specification.