DSA Crash Course [Part 10] - Most Frequent Char Approach

In this lesson, Alvin explores the strategy to solving the following interview problem:

Write a function, most_frequent_char, that takes in a string as an argument. The function should return the most frequent character of the string. If there are ties, return the character that appears earlier in the string.

You can assume that the input string is non-empty.

most_frequent_char('bookeeper') # -> 'e'

most_frequent_char('david') # -> 'd'

most_frequent_char('abby') # -> 'b'

most_frequent_char('mississippi') # -> 'i'

If you need additional support taking these DSA skills and actually applying them, take Alvin's complete data structures and algorithms course on Structy. You can try out the concepts yourself in their interactive code editor and learn advanced DSA patterns like stack exhaustive recursion.

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