Lesson: 111 | indexOf(listElement)

Notes
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Notes

In Apex, the indexOf(listElement) method is used to find the first occurrence of a specified element in a list and return its index. If the element is not found in the list, the method returns -1.

Here's an example:

List<Integer> numberList = new List<Integer>{1, 2, 3, 4, 5};

Integer indexOfElement3 = numberList.indexOf(3);

System.debug('Index of element 3: ' + indexOfElement3);

Output: Index of element 3: 2

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Lesson: 111 | indexOf(listElement)

Notes

Apex Intermediate