Microsoft Excel offers a vast library of built-in formulas, catering to diverse data analysis and calculation needs. As of my knowledge cutoff in September 2021, Excel contains more than 450 predefined functions. These functions range from basic arithmetic operations (e.g., SUM, AVERAGE) to statistical analysis (e.g., COUNTIF, STDEV) and advanced data manipulation (e.g., VLOOKUP, INDEX-MATCH). The extensive range of formulas empowers users to perform complex calculations, data validation, and decision-making tasks efficiently. Gain a detailed understanding by joining KnowledgeHut's Microsoft Excel certification free course.