# Set expression for formula field

- Open the form builder.
- Select the required formula field.
- Navigate to the
**Field Properties**pane on the right. - Click the input box below
**Expression**. The*Calculate Expression*pop-up window will appear. - Set the required
**Expression**:- You can include fields in the expression by either selecting them (from the
**Refer Fields**column) or typing their field link names in the**Expression**box. You can include all field types except add notes and section. - You can include Deluge System Variables by typing them
- You can use built-in functions by typing them

- You can include fields in the expression by either selecting them (from the
- Click
**Insert conditional formula**to define one. Learn how - Upon setting the required
**Expression**, click**Done**. The expression you set will then appear in the input box below**Field Properties >****Expression**.

## Set a conditional expression

- Open the form builder.
- Select the required formula field.
- Navigate to the
**Field Properties**on the right. - Click the input box below
**Expression**. The*Calculate Expression*pop-up window will appear. - Click
**Insert conditional formula**. - Set the
**Condition**:- It must be a boolean expression — an expression which evaluates to
*true*if it is logically correct, else*false* - You can refer to the fields by typing their field link names
- You can use logical functions by typing them

- It must be a boolean expression — an expression which evaluates to
- Set
**Value1**and**Value2**:- These can either be static values or expressions
- The formula field is assigned with
**Value1**when the specified**Condition**evaluates to*true* - The formula field is assigned with
**Value2**when the specified**Condition**evaluates to*false*

- Click
**Insert**. The conditional expression will apper in the*Calculate Expression*pop-up window. - Click
**Done**. The expression will then appear in the input box below**Field Properties >****Expression**.