Is it necessary to use a semicolon at the end of a Arrow Function Expressions

hi there, i have a question, is it necessary to use a semicolon at the end of a Arrow Function Expressions to run it?

in this video we have been told to use it, because its a variable with a function. but in the examples https://teamtreehouse.com/library/javascript-functions/arrow-functions/concise-arrow-function-syntax and on https://www.w3schools.com/js/js_arrow_function.asp and when i practice, it works also without the ;

thanks for checking my question!

kind regards, Max

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