pls explain this formula

IF (ISPICKVAL(Status, "Closed - Converted"), ROUND(NOW()-CreatedDate, 0), null)

how can I store its result value into a variable ?

Hi,

Unable to fetch and save Force.com Components to Project: com.salesforce.ide.api.metadata.types.Metadata$JaxAccessorF_fullName cannot be cast to com.sun.xm.internal.bind.v2.runtime.reflect.Accessor

Abort or Continute Force.com project creation?

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while i am creating a new force.com project i got this error: can u please tell me why this error came. i downloaded eclipse and added force.com ide.... when i try to creating a new force.com project i got this error... and i am able to create a force.com project but not getting all existing classes and pages. And not added my new page or class content to the sever when i save. Is it required any other software installations?