Description: Check if Parameter1 is between Parameter 2 and Parameter 3 according to a passed-in parameter. Syntax: betwcheck,boolean value
Description: Convert a data object to a Boolean value. Syntax: bool(expression) Note: The function converts the data typconvert,boolean value
Description: Perform logical OR operation over members of a sequence. Syntax: A.cor(x) cor(x1,…,xn) Equivalent to A.cosequence,logical or,boolean value
Here’s how to use eq() function.change position,boolean value
Description: Execute the delete command and return a Boolean value. Syntax: es_delete(fd, endpoint, entity，header) Note:execute delete,boolean value
Description: Check whether a variable exists. Syntax: ifv(v) Note: This function is mainly used to find if any variable variable,boolean value
Description: Check if a string is composed of letters. Syntax: isalpha(s) Note: The function checks if string s is compoletter,boolean value
Description: Check if a string is composed of numbers. Syntax: isdigit (string) Note: The function checks if the string number,boolean value
Description: Check if a string is composed of lower-case letters. Syntax: islower(string) Note: The function checks if tlower case letter,boolean value
Description: Check if a string is composed of uppercase letters. Syntax: isupper(string) Note: The function checks if thupper case letter,boolean value