How to convert parts of string to integer?

#1
#2

hello @ganesh2512

to convert string into integer u can use stoi function which u are already doing correctly.

this problem can be solved using pure string only.

check this->

#3

Why do we add ‘0’ at the end? when we are subtracting n[i] from 9

#4

to convert char to inter we subtact ‘0’ from it .

and to convert integer back to char we add ‘0’ to it.

here we are converting the difference(which is integer) back to char

#5

Thankyou, I was confused on this concept since many years

#6

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