LET function

 

Simple LET function | Advanced LET function

Use the LET function in Excel 365 to declare variables and assign values (or calculation results) to variables. Next, use these variables in a calculation.

Simple LET function

Let's start with an easy example.

1. The simple LET function below declares variable x (and assigns the value 2) and declares variable y (and assigns the value 5).

LET variables

Note: the LET function can handle up to 126 variable/value pairs.

2. The final argument of the LET function is always a calculation. In this example, x+y reduces to 2+5=7.

Simple LET function in Excel

Advanced LET function

Why using the LET function in Excel? The LET function can make your formulas easier to read. Let's take a look at a cool example.

1. The VLOOKUP function below returns the sales of ID 14.

VLOOKUP function

Note: visit our page about the VLOOKUP function to learn more about this Excel function.

2. The formula below calculates a bonus (10 percent of every dollar above $5,000).

Bonus Calculation

3. To write a single formula, simply replace H3 with the VLOOKUP function.

Single Formula

This IF formula is quite difficult to read. Simply use the LET function to make it easier to read.

4. The LET function below declares the variable Sales and assigns a calculation result!

Calculation Result

5. Next, use the variable Sales in a final calculation.

Advanced LET function

Note: the IF formula is now easier to understand. This LET function has only 1 variable/value pair.