Use a variable to record the set of numbers you wish to use. Then set variables to mark the points at which the number is considered odd or even. Finally, use two
if (cond, trueValue, falseValue) blocks to return the "Odd", "Even" or "Unknown" text based on the number value.
n%2==0 shows if the number is divisible by 2 with no remainder. This is an "Even" number
n%2 !=0 shows if the number is divided by 2 does have a remainder than the number is "Odd"