[DEVICE LOG] 2019-05-31 19:00:02.916626+0530 localhost Runner[8053]: (Flutter) flutter: ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════ [ +15 ms] ...

I read the documentation of the flutter and know the integer to string and string to an integer, but how can I convert the whole string into an integer for calculation. I have also a program in which ...