Use of 'a' in freq[s[k]-'a']++

[dhairya.bhardwaj786]

why we use ‘a’ in our implementation in frequency (freq[s[k]-‘a’]++)?

[asaurabh_26 (logical coder)]

please see this doubt i have recently solve this

Frequency of unique string

freq is an array so index should be integer s[i] is character but it store as ascii value which is of the range 97 to 122 but we want that a is mapped to 0 and b with 1 and so on so we subtract it with ‘a’ suppose str[i]=‘c’ when we do str[i]-‘a’ then it will 3 so it stored at freq[3] which we want i hope this helps if yes hit a like and don’t forgot to mark doubt as resolved if you have more doubts regarding this feel free to ask

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[asaurabh_26 (logical coder)]

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