ifv()

Read(292) Label: variable, boolean value,

Description:

Check whether a variable exists.

Syntax:

ifv(v)

Note:

This function is mainly used to find if any variable is added to the current execution environment by the external program when the external program calls the program cellset. Generally, there is no need to check the defined variable in the cellset script. They are there for sure if you've defined them.

Parameters:

v

Parameter name

Return value:

Boolean value

Example:

 

A

 

1

>arg1=1

 

2

=ifv(arg1)

true

Related functions:

ift()

ifa()

ifr()