You can attribute a null value to variables to empty them. A null value data type is different from an undefined data type, because a null value data type has been labeled as "null" and not just left empty. Learn this and more during this lecture.
Boolean data types have only two values TRUE and FALSE. Any variable labeled with either TRUE or FALSE is considered a Boolean data type. Learn this and more during this lecture.
Methods are actions that can be performed on objects. Similar to functions they are specific to the object they are associated with. Learn this and more during this lecture.
When you call, or initiate, a function you pass values to it. These are called parameters and the values used for parameters are called arguments. When assigning arguments to parameters the values listed for the arguments must be in the same order as your listed parameters. Learn this and more during this lecture.
Assignment operators are used to assign different values to variables. Learn this and more during this lecture.
The + operator can be used to add strings, or text values, together and is called concatenation (combining into one). It can also be used to add strings and numbers together. Learn this and more during this lecture.
Comparison operators are generally used to test for true or false. They are used in logical statements to test for a difference or equality in variables or values, to return an answer of true or false. They can also be used in conditional statements to compare a set of values and take an action based on the result of the comparison. Learn this and more during this lecture.
Logical operators are used to determine the logic between values and variables. Logical operators are generally used with Boolean values and will return a Boolean result (true or false). However they can be used with non-Boolean values and can return a non-Boolean result. Learn this and more during this lecture.
The switch statement is used to select specific code to execute out of several code blocks. It is similar to an if…else statement, but is easier to use to allow the code to follow a specific path out of many. Learn this and more during this lecture.
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