Google Script to see if text contains a value

Question

I have a google form that when the user submits it will trigger my function to run which is creating a summary of what they submitted as a Google Doc. I know it can automaticall

Answer 1

Update 2020:

You can now use Modern ECMAScript syntax thanks to V8 Runtime.

You can use includes():

var grade = itemResponse.getResponse();
if(grade.includes("9th")){do something}