as false as

undefined is undefined, and the value is undefinedwhen the variable is not assigned a value. "Missing value", that is, there should be a value here, but there is no definition.underclared is a contaminated name, access to a variable that is not

Boolean expressionAn expression with a value of true or false . Non-Boolean expressions can also be converted to a Boolean value if desired, but the following rules are followed: All objects are treated as true. The string is treated as

Best Answer Write a few and try to deduce it. As you can see, at most 1 of these 100 statements are true. Let's say that the 1th statement is true : "In this list, just 1 statements are false" is true, then in the 2nd to 100th statement There is

Boolean expressionAn expression with a value of true or false . Non-Boolean expressions can also be converted to a Boolean value if desired, but the following rules are followed: All objects are treated as true. The string is treated as

The image above is the part of the gridview bound to the background database. The fourth column shows the gender column. The data type in the background database is boolean. The values are true or false. If the value is true, the data type is male.

4.3 Loop control statementsIn the real world, there is such a phenomenon:As long as the current oil in the tank is less than the tank capacity of 100 liters, the fuel tank has been refueling;has been continuously for the motherland hard work, as

4.3 Loop control statementsIn the real world, there is such a phenomenon:As long as the current oil in the tank is less than the tank capacity of 100 liters, the fuel tank has been refueling;has been continuously for the motherland hard work, as

The image above is the part of the GridView bound to the background database. The fourth column shows the gender column. The data type in the background database is boolean. The values are true or false. If the value is true, the data type is male.

A variable in PHPVariables in 1.PHP, declaration and use must start with $2.PHP is a weakly typed language, and variables do not actually need to be declared. You can assign any type of value directly to a variable;You can declare multiple variables

XML version= "1.0" encoding= "UTF-8"?>DOCTYPE Configuration Public "-//mybatis.org//dtd Config 3.0//en" "Http://mybatis.org/dtd/mybatis-3-config.dtd" >Configuration> Settings> whether to turn on level two cache default to True -