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Java Program to count letters in a String
Let’s say we have the following string, that has some letters and numbers.
String str = "9as78";
Now loop through the length of this string and use the Character.isLetter() method. Within that, use the charAt() method to check for each character/ number in the string.
for (int i = 0; i < str.length(); i++) {
if (Character.isLetter(str.charAt(i)))
count++;
}We have set a count variable above to get the length of the letters in the string.
Here’s the complete example.
Example
public class Demo {
public static void main(String []args) {
String str = "9as78";
int count = 0;
System.out.println("String: "+str);
for (int i = 0; i < str.length(); i++) {
if (Character.isLetter(str.charAt(i)))
count++;
}
System.out.println("Letters: "+count);
}
}Output
String: 9as78 Letters: 2
Let us see another example.
Example
public class Demo {
public static void main(String []args) {
String str = "amit";
int count = 0;
System.out.println("String: "+str);
for (int i = 0; i < str.length(); i++) {
if (Character.isLetter(str.charAt(i)))
count++;
}
System.out.println("Letters: "+count);
}
}Output
String: amit Letters: 4
Updated on: 31-May-2024
15K+ Views
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