To create a data validation rule that allows only letters and numbers (no punctuation, symbols, or spaces), you can use a custom formula based on the FIND, SEQUENCE, and LET functions. In the example shown, the data validation applied to B5:B16 is: …Read more
The Excel REGEXREPLACE function replaces text matching a specific regex pattern in a given text string. Regex patterns are very flexible and can be configured to match numbers, email addresses, dates, and other values that have an identifiable structure. By default, REGEXREPLACE will replace all …Read more
Combinations and permutations are two basic ways to count possibilities, used in probability, statistics, games, passwords, and lotteries. This article explains the difference between them, when order and repetition matter, and the Excel functions you can use to calculate each case: FACT, PERMUT, …Read more
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