and: && operator

What will this chunk of the code do? It initializes the variables, sanIsTired to true and sanMustWakeUpEarly to false, The third line of code (comments not included), we determine that San is going to sleep if and only if "and" operation is true -- that is, if both the inputs to "and" operation are true. In this case, first input is true and second input is false. Since the "and" requires both inputs to be true in order for output to be true, but one of an inputs is false, output will become false. So, variable bedTime will store a false value.

"not" operator is used by placing symbol "!", before the boolean value.

This code illustrates the "not" operation. At the end of the code, variable julieIsPeppy will take an opposite value of julieStayedUpLate. If julieStayedUpLate were false, then the variable julianIsPeppy would be true. In this case, opposite is true, so the julieIsPeppy gets the value false.

In addition to boolean operators, C++ has many arithmetic operators. They are listed below:

These operators probably look familiar with an exception of mod (%) operator. Mod is simply a remainder produced by dividing the two integers. In example shown in the table above, if we treat a 10 / 6 as the integer divison, quotient is 1 (rather than being 1.666) and remainder is 4. Hence, a variable remainder will get a value 4.

An equality operator is used to tests the condition like "is less than", "is greater than", and "is equal to". it is useful to to compare two numbers using the expressions like "x<y".

Once using the equality operator is known,it is easy to use all the others. They all will work in the same way: they take an expressions on the either side of them, and will either returns true or false.

In case of an assignment operators return value is simply the value which is stored in a variable on the left-hand-side.

This block of code shows why one might want to throw the return value of the operator. Look at third line, x = 5. We are using an assignment operator here to place a value 5 in a variable x. Since the expression x = 5 returns the value, and we are not been using it, then you can say we are ignoring a return value.

An Operator precedence refers to a order in which the operators are resolved. An operator with a high precedence will be used before the operator with the lower precedence. Here is an example: operators have same precedence as the other operators in their group, and have the higher precedence than the operators in the lower groups.