length function. Collection.(Power Automate Cloud flows)

01/08/2024

Japanese version.

Function to get the number of items in an array.

length also has a function of the same name to get the number of characters.

Spec

length(<collection>)
ArgumentDefaultDescription
collectionRequired fieldTarget array.

How to use

In many cases, it is used to initialize or set variables of type "Integer".

This function is often used in "Condition".

Clicking on length in the "Expression" tab sets the function name and () in the formula field.

Argument is one array.

When dynamic content or variables are used in expressions, special specifications are required.

(How to get dynamic content with expressions.)

If you see something like the following, the setup is complete.

You can change the contents of the function by clicking on the purple icon.

In this case, array variables [100,300,400] are provided as an example.

If the expression is "length(variables('ary1'))", the result is 3.

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Links

Collection Functions(Power Automate Cloud flows)