SheetsdrillValid order IDs
A Google Sheets formula exercise from Sheetsdrill. Solve it with a formula bar on a live sheet in your browser, and it is checked the moment you submit.
The task
A valid order ID is exactly "ORD-" followed by four digits, in capitals. Count the valid IDs in column A with REGEXMATCH inside ARRAYFORMULA. Answer in D1.
What this exercise teaches
Without the anchors, "ORD-12345" would pass because it contains ORD- and four digits. REGEXMATCH is case sensitive.
A hint if you get stuck
^ marks the start and $ the end, so "^ORD-\d{4}$" allows nothing extra. \d means one digit.
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