Brainfuck: Convert ASCII to decimal number

First of all when you read the input from user, it will be stored as ASCII equivalent.

Decimal Number	ASCII Equivalent
0	48
1	49
2	50
3	51
4	52
5	53
6	54
7	55
8	56
9	57

By subtracting the ASCII equivalent of a number with 48 we can get the actual number.

0 = 48 – 48

1 = 49 – 48

2 = 50 – 48

3 = 51 – 48

4 = 52 – 48

5 = 53 - 48

6 = 54 - 48

7 = 55 - 48

8 = 56 – 48

9 = 57 – 48

Below snippet reads a number and convert it to decimal.

,                #Read a number

# Logic to convert ASCII numbers to their decimal format
>
++++++++         # Init second cell to 8 
[
 -
 <
 ------
 >
]
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