Reduces an array to an accumulated value by applying a LAMBDA function to each value
Master the fundamentals of Excel REDUCE function
The REDUCE function applies a LAMBDA function to each element of an array, accumulating a result. It is useful for aggregating array values into a single result.
REDUCE applies a function to each element, passing the current accumulator and element value
REDUCE requires a LAMBDA function that takes accumulator and current value parameters
Use the initial_value parameter to set the starting value for the accumulator
Function-specific parameters
Function-specific return type
REDUCE applies a function to each element, passing the current accumulator and element value
REDUCE requires a LAMBDA function that takes accumulator and current value parameters
Use the initial_value parameter to set the starting value for the accumulator
Exact matching required
Returns numeric position
Handles missing text gracefully
=REDUCE(initial_value, array, lambda)Optional. The initial value for the accumulator
The array to reduce
A LAMBDA function that takes accumulator and current value, returns new accumulator
The final accumulated value
Description: REDUCE([initial_value], array, lambda)
Basic REDUCE function
Reduces A1:A3 to a sum by adding each value to the accumulator
VBA implementation for REDUCE.
Sub REDUCEExample()
Dim result As Variant
' Note: REDUCE is not available in VBA, use alternative methods
' This is a conceptual example
result = Application.WorksheetFunction.Reduce(0, Range("A1:A3"), "LAMBDA(acc, val, acc+val)")
MsgBox "REDUCE result: " & result
End SubArray aggregation
Accumulation operations
Data summarization
Mathematical operations
Conditional aggregation
REDUCE not working
Solution: Ensure the LAMBDA function syntax is correct and takes accumulator and value parameters
Unexpected results
Solution: Check that the initial value and LAMBDA logic are appropriate for your use case