In this article, we are going to learn about accessing individual characters from the given string. Accessing individual characters in a string means retrieving a specific character from the string using its index position (zero-based) or iterating through each character one by one.
Example:
Input : str = neveropen
Output :
Character at index 0: G
Character at index 1: e
Character at index 2: e
Character at index 3: k
Character at index 4: s
Character at index 5: f
Character at index 6: o
Character at index 7: r
Character at index 8: G
Character at index 9: e
Character at index 10: e
Character at index 11: k
Character at index 12: s
There are several methods that can be used to Check if a Number is Odd or Even, which are listed below:
- Using loop with Square Bracket Notation
- Using charAt() Method
- Using slice() Method
We will explore all the above methods along with their basic implementation with the help of examples.
Approach 1: Using loop with Square Bracket Notation
In this approach, Initialize a string `str` and then use a `for` loop to iterate over each character in the string. The loop starts at the first character (index 0) and continues until it reaches the end of the string (str.length – 1). During each iteration of the loop, the program uses the square bracket notation to access the character at the current index and then logs it to the console.
Syntax:
function access(str) {
for (let i = 0; i < str.length; i++) {
const char = str[i];
console.log(`Character at index ${i}: ${char}`);
}
};
Example: In this example, we are using the above-explained approach.
Javascript
function access(str) { for (let i = 0; i < str.length; i++) { const char = str[i]; console.log(`Character at index ${i}: ${char}`); } } const str = "neveropen"; access(str); |
Output:
Character at index 0: G
Character at index 1: e
Character at index 2: e
Character at index 3: k
Character at index 4: s
Character at index 5: f
Character at index 6: o
Character at index 7: r
Character at index 8: G
Character at index 9: e
Character at index 10: e
Character at index 11: k
Character at index 12: s
Approach 2: Using charAt() Method
The charAt() method is used to access the individual characters of a string. This method takes the index as an argument and returns the character of the given index in the string.
Syntax:
character = str.charAt(index)
Example: In this example, we are using the above-mentioned method.
Javascript
function access(str) { for (let i = 0; i < str.length; i++) { const char = str.charAt(i); console.log(`Character at index ${i}: ${char}`); } } const str = "neveropen"; access(str); |
Output:
Character at index 0: G
Character at index 1: e
Character at index 2: e
Character at index 3: k
Character at index 4: s
Character at index 5: f
Character at index 6: o
Character at index 7: r
Character at index 8: G
Character at index 9: e
Character at index 10: e
Character at index 11: k
Character at index 12: s
Approach 3: Using slice() Method
The string.slice() is an inbuilt method in JavaScript that is used to return a part or slice of the given input string. Using the slice method we can easily access individual characters from the String.
Syntax:
arr.slice(begin, end)
Example: In this example, we are using the above-explained approach.
Javascript
function access(str) { for (let i = 0; i < str.length; i++) { const character = str.slice(i, i + 1); console.log(`Character at index ${i}: ${character}`); } } const str = "JavaScript"; access(str); |
Output:
Character at index 0: J
Character at index 1: a
Character at index 2: v
Character at index 3: a
Character at index 4: S
Character at index 5: c
Character at index 6: r
Character at index 7: i
Character at index 8: p
Character at index 9: t
