How to find vector indexes without for loops

i have a vector matrix for example [20,3,56,7,8,96,52,22] and i have another value x=8. now i wanna find the index number of x in that vector without using for or while loop thank you for your help

[David Goodmanson]

Hi Hamid, take a look at the 'find' function

Answer 1

[Guillaume]

 [~, index] = ismember(8, [20, 3, 56, 7, 8, 96, 52, 22]);

or

index = find([20, 3, 56, 7, 8, 96, 52, 22] == 8);

[Hamid Bakht]

thank you so much really helped