LET

Assigns names to calculation results. This allows storing intermediate calculations, values, or defining names inside a formula. These names only apply within the scope of the LET function.

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=LET(Name1; Name_value1; Calculation_or_Name2 [; Name_value2; Calculation_or_Name3 [; ...]])

Name1: the first name to assign. Must start with a letter. Cannot be the output of a formula or conflict with range syntax.

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Name1 must follow the naming rules of LibreOffice Calc.


Name_value1: the value or calculation to assign to Name1.

Name2; Name_value2;...: (optional) same as Name1 and Name_value1, respectively. Name_value2 must follow Name2 and so on.

Calculation: a formula expression that uses all names within the LET function.

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Calculation must be the last argument in the LET function.


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Suppose we have built a small database table occupying the cell range A1:DO4 and containing basic information about 118 chemical elements. The first column contains the row headings β€œElement”, β€œSymbol”, β€œAtomic Number”, and β€œRelative Atomic Mass”. Subsequent columns contain the relevant information for each of the elements, ordered left to right by atomic number. For example, cells B1:B4 contain β€œHydrogen”, β€œH”, β€œ1” and β€œ1.008”, while cells DO1:DO4 contain β€œOganesson”, β€œOg”, β€œ118”, and β€œ294”.

A

B

C

D

...

DO

1

Element

Hydrogen

Helium

Lithium

...

Oganesson

2

Symbol

H

He

Li

...

Og

3

Atomic Number

1

2

3

...

118

4

Relative Atomic Mass

1.008

4.0026

6.94

...

294


Calculate the molar mass of the water molecule knowing that the molecule has 2 hydrogen atoms and one oxygen atom.

=LET(mHydro; HLOOKUP("Hydrogen"; $A$1:$DO$4; 4; 0); mOxy; HLOOKUP("Oxygen"; $A$1:$DO$4; 4; 0); "The molar mass of water is "&(mOxy+2*mHydro)&" g/mol") returns "The molar mass of water is 18.015 g/mol".

Technical information

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This function is available since LibreOffice 24.8.


This function is NOT part of the Open Document Format for Office Applications (OpenDocument) Version 1.3. Part 4: Recalculated Formula (OpenFormula) Format standard. The name space is

COM.MICROSOFT.LET

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