==LET(name1, name_value1, calculation_or_name2, [name_value2, calculation_or_name3...])
=LET(x,10,x+1)
The LET function can be used to assign a value to a variable, and use the variable in a calculation. In the example, the LET function assigns the value 10 to the variable "x", and then adds 1 to the value of "x". This expression returns the value 11.
=LET(x,10,y,5,x+y)
The LET function can also be used for more complex calculations that involve multiple variables. For example, this formula assigns the value 10 to the variable "x" and the value 5 to the variable "y", and then adds the two values together. This expression returns the value 15.
The LET function is a useful tool for defining and creating named variables in a formula. It helps to simplify and organize data in a formula.