How to search for empty string/compare two strings in Robot Framework

I have read this question

as well as the two links to the Robot Framework documentation in the answers but I still don't get how to check if a variable is empty.

I want to do this

if var A equals var B then
   do something
else
   do something else

where A is a string that can both contain something as well as be empty and where B is empty or null.

Solution

can be achieve using many different ways some are as follows, use whichever fits for you

this way you can check two variables equals OR not

Run Keyword If    '${A}'=='${B}'   do something    ELSE    do something

this way you can check if both of your variable are None or not in one go
```
Run Keyword If    '${A}'=='None' And '${B}'=='None'    do something
```
using following also you can get if your variables are equal of not if both values are equal it will return true
```
Should Be Equal    ${A}    ${B}
```
if both values are NOT equal it will return true.
```
Should Not Be Equal   ${A}    ${B}
```

for more information go through this docs

there is also ${EMPTY} variable in robot framework which you can use to check if variable is empty or not