Difficulty for new block

Hello,
Can anyone explain who i can get difficulty of the next block in blockchain?

https://www.coinwarz.com/difficulty-charts/zcash-difficulty-chart

I though difficulty was supposed to be a 32bit? binary number
as that chart shows decimal points ?
or maybe its the chart approximating or averaging

Thanks
(still learn about the hash ‘difficulty’ threshold)

https://www.coinwarz.com/difficulty-charts/zcash-difficulty-chart