DAY 23 OF 90 · Walk the string

Count one letter

Easy90 Days of Looping

Inputs

text is 0 to 24 lowercase letters (a to z). letter is one lowercase letter.

Create a number count that starts at 0.
Use a loop over text. Add 1 to count each time the character equals letter.
Complete countLetter so it returns count. Return it, do not print it.

With text = "banana" and letter = "a", countLetter returns 3.

TEST DATA 1: text is "banana", letter is "a"

TEST DATA 2: text is "", letter is "z"

Text is just a list of characters, so everything you know about lists applies. String problems in interviews are array problems with letters.

DAY 23 OF 90 · Walk the string

Easy90 Days of Looping

text is 0 to 24 lowercase letters (a to z). letter is one lowercase letter.

Create a number count that starts at 0.
Use a loop over text. Add 1 to count each time the character equals letter.
Complete countLetter so it returns count. Return it, do not print it.

With text = "banana" and letter = "a", countLetter returns 3.

TEST DATA 1: text is "banana", letter is "a"

TEST DATA 2: text is "", letter is "z"

Text is just a list of characters, so everything you know about lists applies. String problems in interviews are array problems with letters.