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How to get the first three characters of a string using JavaScript ?

In this article, we are going to learn how to get the first three characters of a string using JavaScript.

Example:



Input:  today
Output: tod

Input: tomorrow
Output: tom

These are the approaches by which we can get the first three characters of a string using JavaScript:

Approach 1: 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.

Syntax:

string.slice(startingIndex, endingIndex);

Example: In this example, we are using Slice() method.




let originalString = "HelloWorld";
let firstThreeChars = originalString.slice(0, 3);
console.log(firstThreeChars);

Output
Hel

Approach 2: Using string.substr() method

Syntax: 

let temp = str.substr(0, 3); 

Example: In this example, we are using string.substr() method.




let originalString = "Geeksforgeeks";
let firstThreeChars = originalString.substr(0, 3);
console.log(firstThreeChars);

Output
Gee

Approach 3: Using For loop

JavaScript for loop is used to iterate the elements for a fixed number of times. JavaScript for loop is used if the number of the iteration is known.

Syntax:

for (statement 1 ; statement 2 ; statement 3){
code here...
}

Example: In this example, we are using For loop.




let originalString = "HelloWorld";
let firstThreeChars = "";
 
for (let i = 0; i < 3; i++) {
    firstThreeChars += originalString[i];
}
 
console.log(firstThreeChars); // Output: Hel

Output
Hel

Approach 4: Using string.substring() method

JavaScript string.substring() is an inbuilt function in JavaScript that is used to return the part of the given string from the start index to the end index. Indexing starts from zero (0). 

Syntax: 

string.substring(Startindex, Endindex);

Example: In this example, we are using string.substring() method.




let str = "HelloWorld";
let result = str.substring(0, 3);
console.log(result)

Output
Hel

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