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Apr 25, 2020 11:58 AM

How can I edit this formula to leave the field blank if the number returned is negative? Thanks!

IF({Update Cycle}=‘1’,({Days Since Update}-30),

IF({Update Cycle}=‘2’,({Days Since Update}-60),

IF({Update Cycle}=‘3’,({Days Since Update}-90),

IF({Update Cycle}=‘4’,({Days Since Update}-120),

IF({Update Cycle}=‘5’,({Days Since Update}-150),

IF({Update Cycle}=‘6’,({Days Since Update}-180),

IF({Update Cycle}=‘7’,({Days Since Update}-210),

IF({Update Cycle}=‘8’,({Days Since Update}-240),

IF({Update Cycle}=‘9’,({Days Since Update}-270),

IF({Update Cycle}=‘10’,({Days Since Update}-300),

IF({Update Cycle}=‘11’,({Days Since Update}-330),

IF({Update Cycle}=‘12’,({Days Since Update}-360),

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12 Replies 12

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Apr 25, 2020 01:37 PM

There might be other ways to do this, but I would just do it as 2 different formula fields.

What you outlined above would give you the result in your 1st formula field.

Then, in your 2nd formula field, you would evaluate whether your 1st formula field was negative or positive. If it was negative, it would result in a blank field. If it was positive, it would show you the same result.

Reply

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Apr 25, 2020 01:42 PM

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Apr 25, 2020 02:00 PM

To have a blank field instead of a negative numbers, wrap the formula in an `IF`

statement. You can also simplify your formula using a little math so that you do not need to nest so many `IF`

statements.

```
IF(
({Days Since Update} - (30 * {Update Cycle})) > 0,
{Days Since Update} - (30 * {Update Cycle})
)
```

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Apr 25, 2020 05:56 PM

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Apr 25, 2020 08:42 PM

Are {Days Since Update} and {Update Cycle} both number fields, or are they some other type of field?

If they are not numbers, their values need to be converted to numbers in order to do math with them. Here are two options:

- Change the field type to number, or
- Wrap the field names in the
`VALUE()`

function in the formula field.

```
VALUE({Days Since Update}}
VALUE({Update Cycle})
```

The formula that I provided already has the `IF`

statement to avoid displaying negative values.

The support page for formulas has more information on how formulas work, including using the `IF`

statement and doing basic calculations.

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Apr 25, 2020 09:03 PM

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Apr 25, 2020 09:10 PM

Now that the field types are numbers, do you still get the error message with my first formula?

If so, can you provide a screen capture that shows all three fields?

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Apr 26, 2020 12:32 PM

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Apr 26, 2020 12:52 PM

You can use the `AND`

function to combine conditions for the `IF`

function:

```
IF(
AND(
NOT({Days Since Update} = BLANK()),
NOT({Update Cycle} = BLANK()),
({Days Since Update} - (30 * {Update Cycle})) > 0
)
{Days Since Update} - (30 * {Update Cycle})
)
```

Normally you can use just the {field name} in the condition, but because these are numeric fields, you need the `NOT({field name} = BLANK()}`

syntax.