Scans an array by applying a LAMBDA to each value and returns an array that has each intermediate value.
Syntax
=SCAN ([initial_value], array, lambda(accumulator, value, body))
The SCAN function syntax has the following arguments and parameters:
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[initial_value] Sets the starting value for the accumulator.
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array An array to be scanned.
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lambda A LAMBDA that is called to reduce the array. The LAMBDA takes three parameters:
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accumulator The value totaled up and returned as the final result.
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value The current value from the array.
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body The calculation applied to each element in the array.
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Remarks
Use the initial_value argument to set the starting value for the accumulator parameter. If you are working with text, set the initial value to "".
Errors
Providing an invalid LAMBDA function or an incorrect number of parameters returns a #VALUE! error called "Incorrect Parameters".
Examples
Example 1: Create a list of factorials
Enter the sample data into cells A1:C2, and then copy the formula into cell D4:
=SCAN(1, A1:C2, LAMBDA(a,b,a*b))
Example 2: Concatenate characters in an array
Enter the sample data into cells A1:C2, and then copy the formula into cell D4:
=SCAN("",A1:C2,LAMBDA(a,b,a&b))
