Print all alphabet using for loop Program in java -

lass Alphabets {
  public static void main(String args[]) {
    char ch;
    for (ch = 'a'; ch <= 'z'; ch++)
      System.out.println(ch);
  }
}

Code Analysis:

1. Class Definition:

class Alphabets

This defines a class named Alphabets. A class is the template by which objects are created in Java; however, in the code below, the class only exists to run a program from within its main method.

2. Main Method:

public static void main(String args[])

There are three methods. This is the main method, and this is the entry point of the program. The program starts executing from this point.

3. Variable Declaration:

char ch;

This declares a variable ch of type char. Java uses the char data type to store single characters.

4. For Loop:

for( ch = ‘a’; ch <= ‘z’; ch++ )

The for loop initializes the variable ch to ‘a’, which is the first lowercase letter of the alphabet.
The loop will run so long as the condition ch <= ‘z’ is true. Since ch starts at ‘a’, and the condition checks if it is less than or equal to ‘z’, the loop will iterate over all the letters from ‘a’ to ‘z’.
After each iteration, the statement ch++ increments the value of ch by 1, moving to the next character in the alphabet (since the characters ‘a’, ‘b’ and ‘z’ are represented by their Unicode values, which are consecutive).

5. Printing the Character:

System.out.println(ch);

This line prints the current value of ch (which will be a letter from ‘a’ to ‘z’) in each iteration of the loop. The System.out.println() method prints the character followed by a new line, so each letter will be printed on a new line.

6. End

The loop runs until ch is greater than ‘z’, and it stops the loop at that moment.

Example Output:

It will print each lowercase alphabet of the English alphabet on new lines:

Explanation of Output:

The loop starts at ch=’a’. It prints out each character. It increases the value of ch in each step of the iteration.

It keeps printing a letter until it hits ch == ‘z’; at which the loop ends.
Each character is printed out on a new line because of System.out.println(ch).

Main Ideas:

char Data Type: In Java, characters use Unicode values for representation.
Character values ‘a’ up to ‘z’ represents consecutive integer values, so as the char variable goes ch++, it reaches the next one.
For Loop: It is the most basic ‘for’ loop definition in Java, where the statement is repeated once for every iteration.
In this case, this loop statement repeats once for each character starting from ‘a’ to ‘z’.