JavaScript program to print Alphabets from A to Z using Loop
Last Updated :
03 Jan, 2024
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.
Below are the loops used to print Alphabets from A to Z:
The elements are iterated through a predetermined number of times in the JavaScript for a loop.
- For loop is used to print the alphabet from A to Z. A loop variable is taken to do this of type ‘char’.Â
- 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
let i;
console.log( "Alphabets form (A-Z) are:" );
for (i = 65; i <= 90; i++) {
console.log(String.fromCharCode(i));
}
console.log( "Alphabets from (a-z) are:" );
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
The element is iterated an infinite number of times. if a number of iterations are not given.Â
- While loop is used to print the alphabet from A to Z. A loop variable is taken to display of type ‘char’.Â
- 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
let i;
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
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.
- The do-while loop is used to print the alphabet from A to Z. A loop variable is taken to display of type ‘char’.Â
- 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
let i;
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
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