Our task is to print the alphabet from A to Z using loops. In this article, we will mainly focus on the following programs and their logic:
- Using for loop: The elements are iterated through a predetermined number of times in the JavaScript for a loop.
- Using the while loop: the element is iterated an infinite number of times. if a number of iterations are not given.
- Using a do-while loop : Similar to a while loop iterates the element an infinite of times .however whether the condition is true or false, the code is always run at least once.
Program to print (A to Z) and (a to z) using for loop:
In the below program:
- For loop is used to print the alphabet from A to Z. A loop variable is taken to do this of type ‘char’.
- The loop variable ‘i’ is initialized with the first alphabet ‘A’ and incremented by 1 on every iteration.
- In the loop, the character ‘i’ is printed as the alphabet.
Example: Below is the example that will print (A to Z) and (a to z) using for loop:
Javascript
// Declaring Variableslet i;console.log("Alphabets form (A-Z) are:");// Using for loop for (A-Z):for (i = 65; i <= 90; i++) { console.log(String.fromCharCode(i));}console.log("Alphabets from (a-z) are:");// Using for loop for (a-z):for (i = 97; i <= 122; i++) { console.log(String.fromCharCode(i));} |
Output:
Alphabets form (A-Z) are: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Alphabets from (a-z) are: a b c d e f g h i j k l m n o p q r s t u v w x y z
Program to print (A to Z) and (a to z) using while loop:
In the below program:
- While loop is used to print the alphabet from A to Z. A loop variable is taken to display of type ‘char’.
- The loop variable ‘i’ is initialized with the first alphabet ‘A’ and incremented by 1 on every iteration.
- In the loop, the character ‘i’ is printed as the alphabet.
Example: Below is the example that will print (A to Z) and (a to z) using for while loop:
Javascript
// Declaring Variableslet i;// Initializing i = 65 for Uppercase:i = 65;console.log("Alphabets form (A-Z) are:");while (i <= 90) { console.log(String.fromCharCode(i)); i++;}i = 97;console.log("Alphabets from (a-z) are:");while (i <= 122) { console.log(String.fromCharCode(i)); i++;} |
Output:
Alphabets form (A-Z) are: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Alphabets from (a-z) are: a b c d e f g h i j k l m n o p q r s t u v w x y z
Program to print (A to Z) and (a to z) using a do-while loop:
In the below program:
- The do-while loop is used to print the alphabet from A to Z. A loop variable is taken to display of type ‘char’.
- The loop variable ‘i’ is initialized with the first alphabet ‘A’ and incremented by 1 on every iteration.
- In the loop, the character ‘i’ is printed as the alphabet.
Example: Below is the example that will print (A to Z) and (a to z) using for do-while loop:
Javascript
// Declaring Variableslet i;// Initializing i = 65 for Uppercase:i = 65;console.log("Alphabets form (A-Z) are:");do { console.log(String.fromCharCode(i)); i++;} while (i <= 90);i = 97;console.log("Alphabets from (a-z) are:");do { console.log(String.fromCharCode(i)); i++;} while (i <= 122); |
Output:
Alphabets form (A-Z) are: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Alphabets from (a-z) are: a b c d e f g h i j k l m n o p q r s t u v w x y z
