# penum()

Read（367） Label: judge, enum group,

Here’s how to use penum() function.

## E .penum()

Description:

Judge to which enum group an object belongs.

Syntax:

E.penum(y)

Note:

The functions judges to which group of record sequence E the y belongs, and returns the sequence number(s) of the group(s), i.e. sequence number(s) of the record(s) of E that satisfy the grouping condition.

Parameters:

 E A sequence/record sequence y y is allowed to be omitted

Options:

 @r Return the sequence numbers of all the groups satisfying the grouping condition, and the default is to return the sequence number of the first group @n If no eligible sequence member of E is found, return the length of E plus 1.

Function keyword:

 ? Represents the value of y

Return value:

A sequence number or an integer sequence composed of sequence numbers

Example:

Ø  E is the sequence

 A 1 =["?<=70&&?<=60","?>=70 && ?<=90","?>=90"] Use y to replace the ? in the grouping conditions when computing 2 =A1.penum(90) 2; the sequence number of the first group satisfying the condition will be returned 3 =A1.penum@r(90) [2,3]; return the sequence numbers of all the groups 4 =A1.penum@n(43) 4

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