Скачать или смотреть UiPath Variables in depth tutorials Part - 6

we will learn variables in uipath or UiPath Variables in depth. By end of this part you will understand all the details about variables and how to use them.
As i have already told you variable is a memory location where we can store some value. This value can change in future also. In the layman term it is just like a container which can store some value and this value can be shared between activities.
Variables can store a specific type of data. Means if a variable is declared to store string values then it can not store number values. The type which is use to declare the variable type is called data types. Below are list of data types by default UiPath supports.
1. Number
2. bool
3. string
4. float
5. custom
6. array
7. all data types available in .net framework.
Number:-
this data type is used store number values
bool:-
this is used to store values like true and false.
Its value can not be other than these two vales.
This is usefull when making decessions.
String:-
this is used to store any textual values.
Float:- this is used to store floating/frection numbers i.e. 1.2
custom:- if all the datatypes provided by uipath are not sufficient then we can define our custom data types and use it. This is little bit advance topic so i will be explaing these in advance topices.
Array:- we can say it can store some collection of values.

these are few out of many data types which are available in uipath. Going forward we will be using many of them.

How to use
declare the variables:- to declare a variable we have to first we have to give a name then we have to specify the types of data it is going to store.
every variable when declare it has a predefined values which by default set by uipath.
but if you want to set a default value then we can do it while declaring the values.
Set the scope of the variable:- scope is a way by which we are defining the visibility of the variable. Higher scope variables are always visible in the lower scope but reverse is not possible. So while defining this is a most important part.

How to create:-
variables can be created in 3 ways in uipath.
from the ribbon
from variable panel
from the properties windows.

Note:- to declare a variable you need at least one activity in the designer, with any activity you can not declare variables.
Ribbon:-
so as we have the limitation we will now place an activity in the designer. Once the activity is in the designer let us create variable from the ribbon. To create a variable from the ribbon just go the create variable option in the ribbon. Set the data type to string.
Let us put a message box activity to show the value. Now let us set the default value for the variable and see how it works.
Panel:-
to declare a variable you need to select the activity where you want to create a variable. When you will select any of the rows in the variable panel it will create a new variable with default values. And the scope will be the selected element.
The difference between creating the variable from the ribbon and the panel is specially the default values.
The ribbon options has more options than the ribbon, but we can create variables using both.
Property window:-
to create a variable from the property window just go to the property and ctrl+k or right click to get all the context options available for that property. One of them is the create variable. It will create variable with default type of that field.
Now let us talk about the important part that is the scope. Let us drag another sequence inside the parent sequence. Create a variable outing the scope to the child sequence. Now let us go to the parent sequence and try to access the variable. You can see once you will select the parent activity you will not see the variable in the panel. This is because we create the variable in the child scope and according to the rule you can not access the variable of child in the parent activity.
Let use go to the child activity create a variable if we select the activity then then the scope id set to the child. Now switch to parent activity you will not see the variable.
Custom:- ok still now we have discuess about other types, when the predefiend types are not able to full fill our requirement then we can go ahead and define our types. I will just give you little about custom types how it looks suppose you want to transfer some account data in that case we do not have any buid in data type which can hold our data in that case we can define our data types.
Account-|
|- Accound iD
|- Accound Name
|-age
|-balance
|-interest rate
|-account type


There are many other types of activity present in UiPath, it is hard to explain every thing at here, so we will learn then while going through this series.