#data validity checking
#validIf.py

num = eval(input("Enter a number between 1 and 10: "))

  #true if invalid, i.e. out of range
if num<1 or num>10:
    print("Error.  Invalid data")

  #true if valid, i.e. in range.  opposite test of above
if num>=1 and num<=10:
    print("Thanks for good input data")

  #true if valid, i.e. in range
if 1 <= num <= 10:
    print("Thanks for good input data")


  #SYNTAX ERROR: try it and see
  #can't have relational operator and logical operator adjacent
#if num<1 or >10:
#    print("bad bad bad boolean expression!")
  

  #WRONG.  not asking if num equals 2 or 4
  #Python is not English
if num == 2 or 4:
    print("ALWAYS true!  useless and wrong")
  #this is how to ask if num is 2 or 4:
if num==2 or num==4:
    print("it's 2 or it's 4")