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This function is used to assign names to calculation results. The variable names can then be used to store intermediate calculations, values, or defining names within braces of the LET() function. To use this function, you have to define pairs of names and values associated with it and a calculation that uses them all.
By using this function, users do not have to remember what a specific range or cell reference referred to, what your calculation is supposed to do or even copy-pasting the same expression all over again.
LET(name1, name_value1, calculation_or_name2, [name_value2, calculation_or_name3...])
This function has these arguments:
Argument | Description |
---|---|
name | First name to assign. Must always begin with a letter and should not contain a '.' |
name_value1 | The value that is assigned to name1. |
calculation_or_name2 | You can define one of the following.
|
name_value2 | [Optional] The value or calculation that is assigned to calculation_or_name2. |
calculation_or_name3 | [Optional] You can define one of the following.
|
Returns variant data type.
The last argument must always be a calculation that returns a result.
The following code sample shows the basic usage of the LET function.
var formula = '=LET(x,2,x+3)';
sheet1.setValue(2, 0, 'Pair varible');
sheet1.setValue(2, 1, formula);
sheet1.setValue(3, 0, 'Result');
sheet1.setFormula(3, 1, formula);
The following code sample shows the usage of the LET local variable and custom name with the LET function.
sheet1.addCustomName('user', '="Michael"');
var formula = '=LET(user,"Ivy","The actual user is: "&user)';
sheet1.setValue(2, 0, 'Always use LET local variable first');
sheet1.setValue(2, 1, formula);
sheet1.setValue(3, 0, 'Result');
sheet1.setFormula(3, 1, formula);
// Use custom name if local variable is not available
var formula = '=LET(user,user,"The actual user is: "&user)';
sheet1.setValue(5, 0, 'Use custom name if local variable is not available');
sheet1.setValue(5, 1, formula);
sheet1.setValue(6, 0, 'Result');
sheet1.setFormula(6, 1, formula);
Note: The name argument should not contain a '.' and has been updated to match Excel's updated behavior. Refer Release Notes for Version 14.1.0 to learn more.