Code to search an item from an array using linear search

linear-search-javascript-array

/* RUN THIS CODE AND OPEN YOUR CONSOLE TO SEE THE OUTPUT */

// Code to search an item from an array using linear search

// declare a function which will take two arguments: array and itemToSearch
const doLinearSearch = (arr, itemToSearch) => {
	// iterate using for loop, where i is index and elem is each item
	for (const [i, elem] of arr.entries()) {
		if (elem === itemToSearch) {
			// return index, if elem matched with item to search
			return i
		}
	}
}

// declare an array
arr = [10, 20, 30, 40, 50, 60]
// declare item to search
const itemToSearch = 50

// call a function to search item from an array
// if item find this function will return index of an item
const itemIndex = doLinearSearch(arr, itemToSearch)
if (itemIndex > -1) {
	console.log("Item found at index: " + itemIndex)
	console.log("Item found is: " + arr[itemIndex])
} else {
	console.log("Item not found")
}

/*
THE OUTPUT IS:

"Item found at index: 4"
"Item found is: 50"

*/