17. Rotate Left in an 8-bit Register

You are given an 8-bit register and a number of positions n. Rotate the register to the left by n bits. The rotation must be circular, meaning the leftmost bits wrap around to the right.

Use 0-based indexing, and return the result as an 8-bit value.

Example 1

Input: reg = 0b1011 0000, n = 1 
Output: 0b0110 0001

Example 2

Input: reg = 0b1000 0001, n = 2 
Output: 0b0000 0110

Example 3

Input: reg = 0b1111 1111, n = 4 
Output: 0b1111 1111