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Write a program to find the index of particular element in an array in javascript?
indexOf()
To find the index of any element , indexOf() method is used .The following example gives the index of a particular element(solarCity) from a given array.
Example
<html>
<body>
<p id="index"></p>
<script>
var companies = ["Spacex", "Tesla", "SolarCity", "Neuralika"];
var res = companies.indexOf("SolarCity");
document.getElementById("index").innerHTML = res;
</script>
</body>
</html>Output
2
This method also helps to find the index of an element after a given specified index.The following example searches index of a particular element " solarCity" not from starting but from the given specified index 4.Therefore the index is 6 but not 2.
Example
<html>
<body>
<p id="index"></p>
<script>
var companies = ["Spacex", "Tesla", "SolarCity", "Neuralika", "Spacex",
"Tesla", "SolarCity", "Neuralika"];
var res = companies.indexOf("SolarCity", 4);
document.getElementById("index").innerHTML = res;
</script>
</body>
</html>Output
6
Published on 20-May-2019 11:51:13
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