How to find all elements in a given array except for the first one using JavaScript ?

In this article, we will learn how to find all elements in a given array except for the first one. There are multiple methods:

• JavaScript for loop
• JavaScript slice() Method
• Using Array.filter method
• JavaScript Array.reduce() Method

Method 1:  JavaScript for loop: In this method, we will use a for loop to grab all the elements except the first. We know that in an array the first element is present at index ‘0’. We will run a loop from 1 to array.length and save those remaining elements to another array.

Example: In this example, we will be using for loop to find all elements in an array except for the first element.

Javascript

//Javascript program to find all
//element of an array except first

//function which takes an array as argument
const print = (arr) => {

    //creating a dummy array to store result
    const find = []

    //a counter for adding result
    let k = 0

    for (let i = 1; i < arr.length; i++) {
        find[k] = arr[i]
        k++
    }
    //returning resultant array
    return find
}
//input array
const arr = [1, 2, 3, 4, 5]

//printing the result
console.log(print(arr))

Output:

[ 2, 3, 4, 5 ]

Method 2: JavaScript slice() Method: The slice() is a method that returns a slice of an array. It takes two arguments, the start and end index.

Example: In this example, we will be using the slice() method to find all elements in an array except for the first element.

Javascript

//Javascript program to find all
//element of array except first

//function which takes an array as argument
const print = (arr) => {

    //returning resultant array
    return arr.slice(1)
}
//input array
const arr = [10, 20, 30, 40, 50]
//printing the result
console.log(print(arr))

Output :

[20, 30, 40, 50]

Method 3: Using Array.filter method: The Array.filter() method is used to create a new array with elements from the existing array which satisfies the condition.

Example: In this example, we will be using the filter() method to find all elements in an array except for the first element.

Javascript

//Javascript program to find all
//element of array except first

//function which takes an array as argument
const print = (arr) => {

    //returning resultant array
    return arr.filter((x, y) => y != 0)
}
//input array
const arr = [10, 20, 30, 40, 50]
//printing the result
console.log(print(arr))

Output:

[20, 30, 40, 50]

Example 4: JavaScript Array.reduce() Method: The Array.reduce() is used to perform the function on each element of an array and form a single element. 

Example: In this example, we will be using the reduce() method to find all elements in an array except for the first element.

Javascript

//Javascript program to find all
//element of array except first

//function which takes an array as argument
const print = (arr) => {

    //returning resultant array
    return arr.reduce((a, x, i) => (i == 0) ? a : a.concat(x), [])
}
//input array
const arr = [10, 20, 30, 40, 50]
//printing the result
console.log(print(arr))

Output:

[ 20, 30, 40, 50 ]