How to check if Specified Element is present in the Array in TypeScript - Step by Step Examples

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How to check if Specified Element is present in the Array in TypeScript ?

Answer

To check if a specified element is present in an array in TypeScript, you can use methods like indexOf.

✐ Examples

1 Check if Element 30 is present in Integer Array using indexOf

In this example,

We create an integer array named numbers with values 10, 20, 30, 40, 50.
We use the indexOf method to check if element 30 is present in the array.
The indexOf method returns the index of the first occurrence of the element, or -1 if the element is not found.

TypeScript Program

const numbers: number[] = [10, 20, 30, 40, 50];
const index: number = numbers.indexOf(30);
console.log(`Index of element 30 is: ${index}`);

Output

Index of element 30 is: 2

2 Check if Element 'banana' is present in String Array using indexOf

In this example,

We create a string array named fruits with values 'apple', 'banana', 'cherry'.
We use the indexOf method to check if element 'banana' is present in the array.
The indexOf method returns the index of the first occurrence of the element, or -1 if the element is not found.

TypeScript Program

const fruits: string[] = ['apple', 'banana', 'cherry'];
const index: number = fruits.indexOf('banana');
console.log(`Index of 'banana' is: ${index}`);

Output

Index of 'banana' is: 1

Summary

In this tutorial, we learned How to check if Specified Element is present in the Array in TypeScript language with well detailed examples.

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How to check if Specified Element is present in the Array in TypeScript - Step by Step Examples

How to check if Specified Element is present in the Array in TypeScript ?

Answer

✐ Examples

1 Check if Element 30 is present in Integer Array using indexOf

TypeScript Program

Output

2 Check if Element 'banana' is present in String Array using indexOf

TypeScript Program

Output

Summary

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