What does the >=1 mean in the for loop?

Hi, I am following this guide on implementing Word2Vec on a dataset for Text Classification. link

In the section for "Converting every sentence to a numeric vector", there's a line of code:

for word in WordsVocab[CountVecData.iloc[i,:]>=1]:

I am confused about this, especially because of >=1 part. To the best I have been able to deduce, it seems that it checks if the ith row in CountVecData dataframe has a value >= 1 (meaning one or more elements in the ith row are 1), if so then it searches for the corresponding word in WordsVocab (as iloc will return the one hot encoding vector) and then does further task on it defined by the next lines of code.

Is this correct? And how does this work exactly? Especially the >=1 part?