Here's a comparison of the availability of different functions in Google Sheets and Excel, sorted by their importance/popularity:

1. SUM: Both Google Sheets and Excel have the SUM function, which adds up a range of numbers. It is essential for basic calculations and aggregating data.

2. IF: Both programs support the IF function, which allows you to perform conditional calculations based on a specified condition. It is crucial for creating logical expressions and making decisions in spreadsheets.

3. VLOOKUP: Excel has the VLOOKUP function, which searches for a value in the leftmost column of a table and returns a corresponding value from a specified column. It is commonly used for data lookup and retrieval. Google Sheets has a similar function called VLOOKUP, but with some minor differences in syntax.

4. COUNT: Both programs have the COUNT function, which counts the number of cells in a range that contains numbers. It is useful for data analysis and determining the size of a dataset.

5. AVERAGE: Both Google Sheets and Excel support the AVERAGE function, which calculates the average of a range of numbers. It is frequently used for analyzing data and determining the mean value.

6. CONCATENATE: Both programs offer the CONCATENATE function, which combines multiple text strings into one. It is valuable for merging data from different cells or creating custom labels.

7. INDEX: Excel includes the INDEX function, which returns the value of a cell in a specified row and column of a range. It is helpful for advanced data lookup and retrieval. Google Sheets has a similar function called INDEX, with a similar purpose but slightly different syntax.

8. PIVOT TABLES: Excel has the ability to create pivot tables, which are powerful tools for data summarization and analysis. Pivot tables allow you to quickly generate insights from large datasets by summarizing and organizing data based on different criteria. Google Sheets has limited support for pivot tables, but it has basic functionality for simple data summarization.

Both Google Sheets and Excel offer a wide range of functions beyond these examples, and the availability of specific functions may vary between versions and updates of the software. However, the functions listed above are commonly used and provide a good overview of the capabilities of both programs.
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