How to Assign a Variable inside Formula in Excel

The LET function is a new feature introduced in Excel 365. It allows you to define and name intermediate calculations within a formula, making it easier to read and maintain complex formulas. It’s syntax is: LET(name1, value1, [name2, value2], ..., expression)

The first argument specifies the name of the first calculation, and the second argument is the value or formula used in that calculation. You can have multiple name/value pairs separated by commas to define additional calculations.

The last argument is the final expression that uses the intermediate calculations to produce the result. Within the expression, you can refer to the intermediate calculations by their assigned names.

Here's an example of using the LET function to calculate the sum of the squares of the first 10 positive integers:

In this example, we define the variable "n" to be 10, then use the SEQUENCE function to create a sequence of the first 10 positive integers. We assign this sequence to the variable "nums", and then define the variable "squares" as the square of each number in "nums". Finally, we calculate the sum of the squares by calling the SUM function on the "squares" variable.

The result of this formula is 385, which is the sum of the squares of 1^2, 2^2, 3^2, ..., 10^2.