create a JavaScript function that accepts three parameters, and returns the Caesar Cipher encrypted text:

Function name: CaesarEncrypt(clearText, shiftNum, shiftLeft)

Parameters:

• clearText: the unencrypted string
• shiftNum: the integer number of positions to shift
• shiftLeft: the Boolean value of whether the shifting is left (true), or right (false)

Return: Encrypted text using the parameter values.

You will ONLY encrypt (i.e., shift) uppercase or lowercase alphabetic characters. All other characters are returned unshifted.