Conditional Challenges 3

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       //#1
       //declare four variables, num1, num2, operator, and result
       //num1 and num2 will contain numeric values
       //operator will contain a math operator in a string (either "+","-","/", or "*")
       //result will contain null

       //#2
       //declare a switch statement which
       //adds, subtracts, multiplies, or divides the two numbers based on the operator you declared
       //stores the result of the calculation in the result variable you created in the previous step
       //and console logs that result once the switch has completed running
       //have the switch's default statement console log "Invalid operator"
       //#3
       // Bonus: declare a conditional statement which replicates the functionality of the conditional
       //you created in the previous step.
       //if an invalid operator or number is used, you should console log "invalid operator or number was used"
       //#4
       //Bonus: create a similar switch statement that uses fall through to
       //allow the use of "x" and "X" for multiplication
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