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If-Null

Command Description​

Determine if the data is null (NULL)

Command Prototype​

bRet = IsNull(varData)

Parameter Description​

ParameterRequiredTypeDefaultDescription
varDataTrueexpression$PrevResultThe data to be determined

return​

bRet，The variable used to save the output of the command.

Demo​

TracePrint("----------------------------------is it null--------- ---------------------------") 
//------------------------------------------------------------------------------- 
//[Remarks] Determine whether the data type is a null value. 
//Input parameter 1: 
//      varData----->target data 
//out parameters: 
//       returns the result of whether it is a null value, true and false 
a = Null 
bRet = IsNull(a) 
TracePrint("Let the variable a be null, judge whether it is empty, the result is: ") 
TracePrint(bRet) 
 
a = "Hello UiBot" 
bRet = IsDictionary(a) 
TracePrint("Let the variable a be Hello UiBot to judge whether the variable a is empty, the result is: ") 
TracePrint(bRet)