Robot Framework - Greater than or equal and Less than or equal

Question

I am trying to set value for giftAmt based on Don_Number value. When I try to execute always goes to first ELSE IF condition. Even if Don_Number is 70 it stores GiftAmt as 15 only. I tried with IF and also Run keyword. Please advise how to resolve this.

(example if Don_Number is 250$ then GiftAmt should be 25)

  IF  ${Don_Number} <= 100
  ${GiftAmt}  Set Variable  10
  ELSE IF     ${Don_Number} >= 101 or ${Don_Number} <= 149
  ${GiftAmt}  Set Variable  15
  ELSE IF     ${Don_Number} >= 150 or ${Don_Number} <= 199
  ${GiftAmt}  Set Variable  20
  ELSE IF     ${Don_Number} >= 200 or ${Don_Number} <= 299
  ${GiftAmt}  Set Variable  25
  ELSE IF     ${Don_Number} >= 300 or ${Don_Number} <= 399
  ${GiftAmt}  Set Variable  35
  END

or Run Keyword If ${Don_Number} >=101 or ${Don_Number} <=149 ${GiftAmt} Set Variable 15 Run Keyword If ${Don_Number} >=150 or ${Don_Number} <=199 ${GiftAmt} Set Variable 20 Run Keyword If ${Don_Number}>=200 or ${Don_Number} <=299 ${GiftAmt} Set Variable 25 Run Keyword If ${Don_Number} >=300 or ${Don_Number} <=399 ${GiftAmt} Set Variable 35

Answer 1

You need to use and instead of or in the conditions, otherwise for any number greater than 100, ${Don_Number} >= 101 will be evaluated to True causing value 15 to be selected. Another option a bit cleaner will be:

  IF  ${Don_Number} <= 100
      ${GiftAmt}  Set Variable  10
  ELSE IF    101 <= ${Don_Number} <= 149
      ${GiftAmt}  Set Variable  15
  ELSE IF    150 <= ${Don_Number} <= 199
      ${GiftAmt}  Set Variable  20
  ELSE IF    200 <= ${Don_Number} <= 299
      ${GiftAmt}  Set Variable  25
  ELSE IF    300 <= ${Don_Number} <= 399
      ${GiftAmt}  Set Variable  35
  END

Answer 2

Dan has given you a crisp code but if you want it in more detail to understand it better then, You can just modify it slightly , as below:

  IF  ${Don_Number} <= 100
  ${GiftAmt}  Set Variable  10
  ELSE IF     ${Don_Number} >= 101 and ${Don_Number} <= 149
  ${GiftAmt}  Set Variable  15
  ELSE IF     ${Don_Number} >= 150 and ${Don_Number} <= 199
  ${GiftAmt}  Set Variable  20
  ELSE IF     ${Don_Number} >= 200 and ${Don_Number} <= 299
  ${GiftAmt}  Set Variable  25
  ELSE IF     ${Don_Number} >= 300 and ${Don_Number} <= 399
  ${GiftAmt}  Set Variable  35
  END