Find the Array Index with a Value in JavaScript - GeeksforGeeks

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A computer science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.
We have a given value and we need to find out whether the given is present in the array or not, If it is present then we have to print the index number of that existing value, and if it is not present then we will print -1. Example 1

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