Data type conversion in Matlab

I have a fundamental question i.e. if I write in Matlab

Variable = 10;
the variable will be of double class and 8 bytes wide.
now if I change its type as 

variable=uint8(variable);
it will be converted to an unsigned int and will be 1 byte wide 
The problem is here when I assign a new value to this variable it changes its class automatically and goes back to double class whereas I had changed its class from double to uint8.

Can anyone address this issue, please?

Answer 1

[KSSV]

Default class in matlab is double. If you want class uint8 every time you have to use it.