Iterating in Excel

Iterating with VBA Macros

Excel VBA macros enable advanced iteration through rows and columns for tasks like date comparison and data aggregation. Use the 'For', 'For Each', or 'Do While' loops in VBA to execute repetitive actions. 'For' loops require a counter, 'For Each' loops go through collections, and 'Do While' loops continue while conditions are true. The macro 'oneM_lag' exemplifies iteration by comparing dates, summing values, and lagging dates by one month.

Using Formulas for Iteration

Excel formulas offer iteration capabilities for managing spreadsheet data. The formula =IFERROR(IF($G14=L$4, IF($H1453,VLOOKUP($H14,Table2[#All],(COUNTIF($K14:K14, ">0")+2),), 0)*$E14, 0), 0) iterates to calculate weekly planned hours, set project durations, and eliminate errors. It employs a 'for' loop-like structure, a VLOOKUP function, and a COUNTIF function to count non-zero values.

Loop Types in Excel VBA

Excel VBA provides three loop structures for various iteration needs. 'For' loops with counters are ideal for a known number of iterations. 'For Each' loops are suited for object collections within Excel, such as ranges or sheets. 'Do While' and 'Do Until' loops are conditional, executing until the specified condition is no longer true, or becomes true, respectively. Use the 'exit' command within any loop to terminate it prematurely if necessary.

Common Use Cases

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  Automating repetitive tasks such as data entry or formatting across multiple cells
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  Generating reports by filling in data points across various rows and columns systematically
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  Performing bulk calculations by applying formulas to a range of cells
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  Creating dynamic charts and tables that update as new data is iterated through and entered
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  Sorting and filtering large datasets by implementing macros to iterate through each row or column

Excel vs Sourcetable: A Comparative Overview

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