If I want to find Index of "example" from the text "this is an example of a text" and answer should be 3 https://www.construct.net/en/forum/construct-3/how-do-i-8/find-index-location-string-156366

Triggered after the 'Set value' action when a variable is changed. It can be used to listen for changes in some variables, which is very effective. For example, updating UI text when a variable is changed without every tick execution.