Using 1s and 0s to change data to NaN

Suppose I have 2 arrays

A = [1,2,3,4,5,6,7,8]
B = [0,1,1,0,1,0,0,1]

I only want to keep the numbers that match 1s in a second array and turn 0s to NaN, So the output should be

C = [Nan,2,3,NaN,5,NaN,NaN,8]

Is there a way to do this?

The actual situation I want to apply it to has much more data but I assume the concept will be transferrable

Answer 1

[Azzi Abdelmalek]

A = [1,2,3,4,5,6,7,8]
B = [0,1,1,0,1,0,0,1]
C=A;
C(~B)=nan

[Robert]

Perfect, Thank you :)