Build a tiny version of the Unix wc -w command. Given a list of lines, return the total number of words (whitespace-separated tokens) across all lines as an integer.
Function signature:
func countWords(lines []string) int
Example:
Input: lines = ["hello world", "foo bar baz", ""] Output: 5
The empty string contributes 0 words, "hello world" contributes 2, and "foo bar baz" contributes 3. Total: 5.
Words are separated by one or more spaces or tabs, and leading or trailing whitespace is ignored. A line with no words (empty, or only whitespace) contributes 0, and an empty list of lines gives 0. The input is plain ASCII text.
Iterate over the lines and accumulate the word count. Empty lines must contribute zero.
Use
strings.Fields(line): it splits around runs of whitespace and returns an empty slice for an empty or whitespace-only line, so len(strings.Fields(line)) is the word count.
The full solution:
func countWords(lines []string) int {
total := 0
for _, line := range lines {
total += len(strings.Fields(line))
}
return total
}
Free plan: 30 tutor messages. Premium is unlimited.
Saved
Ctrl + Enter to check
