Description:
Find whether an object is a
sequence.
Syntax:
ifa(x)
Note:
The function finds whether
the parameter x
is a sequence.
Parameter:
|
x
|
The object to be judged.
|
Return value:
Boolean
Example:
|
|
A
|
|
|
1
|
=ifa([1,2,3])
|
True
|
|
2
|
=ifa(123)
|
False
|
Related function:
ift()
ifr()
ifv()