Searching for a Value in an Array Using JavaScript.-JS Tutorial-php.cn

Searching for a Value in an Array Using JavaScript.

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Release： 2024-07-29 14:21:10

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This program demonstrates how to search for a specific val within an array using a while loop in JavaScript. The user is prompted to enter a value, and the program then checks if this value exists in a predefined variety. If the value is found, a message indicating its availability is displayed; otherwise, a message indicating its absence is shown.

Simple Example:

let Val = prompt("Enter Value ..!");
let numbers = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300];

let i = 0;
let Find = false;
while (i < numbers.length) {
  if (numbers[i] == Val) {
    Find = true;
    break;
  }
  i++;
}
if (Find) {
  console.log("Available Variable..!");
} else {
  console.log("No Available Variable..!");
}

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Output:

100 This Variable Available in the Array..!

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Finding an Element in an Array Using DOM in JavaScript:
In this program, we demonstrate how to search for a specific value within an array using a while loop in JavaScript. The user enters a value in an input field, and the program checks if this value exists in a predefined array. If the value is found, a message indicating its availability is displayed; otherwise, a message indicating its absence is shown.

Example:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Find Element in Array Using DOM in JavaScript </title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 20px;
        }
        h4, h2 {
            color: #333;
        }
        input {
            padding: 10px;
            margin-right: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
        }
        button {
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            background-color: #28a745;
            color: white;
            cursor: pointer;
        }
        button:hover {
            background-color: #218838;
        }
    </style>
</head>
<body>
    <h4>Find Element in Array</h4>
    <h4 id="NumData"></h4>
    <input type="text" placeholder="Enter Value" id="Num" />
    <button onclick="SearchEle()">Find</button>
    <h2 id="Ans"></h2>

    <script>
        let Data = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300];
        document.getElementById("NumData").innerHTML += "Our Array is: " + Data.join(', ');

        function SearchEle() {
            let NewValue = document.getElementById("Num").value;
            let i = 0;
            let Find = false;
            while (i < Data.length) {
                if (Data[i] == NewValue) {
                    Find = true;
                    break;
                }
                i++;
            }

            if (Find) {
                document.getElementById("Ans").innerHTML = `${NewValue} 
                is Available..!`;
            } else {
                document.getElementById("Ans").innerHTML = `${NewValue} 
               is not Available..!`;
            }
        }
    </script>
</body>
</html>

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Output:

Image description

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