This is a simple guide on making a number parser
Blocks -
Project Link -
Happy Thunking!! 
@luv.ak.tech
if doubts then feel free to ask!!
I want to create Two more variables named as j and b but everytime i am making but it is coming with app variable j and b.So how to remove app variable
actually you need app variable it contains the numbers if you need different name for it then just rename it