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# 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.

### Syntaxe

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.

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.

Calculation must be the last argument in the LET function.

### Exemples

Supposons que nous ayons construit une petite table de base de données occupant la plage de cellules A1:DO4 et contenant des informations de base sur 118 éléments chimiques. La première colonne contient les en-têtes de ligne " Élément ", " Symbole ", " Numéro atomique " et " Masse atomique relative ". Les colonnes suivantes contiennent les informations pertinentes pour chacun des éléments, classées de gauche à droite par numéro atomique. Par exemple, les cellules B1:B4 contiennent "Hydrogène", "H", "1" et "1,008", tandis que les cellules DO1:DO4 contiennent "Oganesson", "Og", "118" et "294".

| A | B | C | D | ... | DO
--- | --- | --- | --- | --- | --- | ---
1 | Élément | Hydrogène | Hélium | Lithium | ... | Oganesson
2 | Symbole | H | He | Li | ... | Og
3 | Numéro atomique | 1 | 2 | 3 | ... | 118
4 | Masse atomique relative | 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".

#### Informations techniques

This function is available since LibreOffice 24.8.

Cette fonction ne fait pas partie de Open Document Format for Office Applications (OpenDocument) Version 1.3. Partie 4 : Norme de format de formule recalculée (OpenFormula). L'espace de nom est

COM.MICROSOFT.LET

Rubriques connexes

LET wiki page.