C++ statements are the program elements that control how and in what order objects are manipulated. This section includes:
Categories of Statements
Expression statements. These statements evaluate an expression for its side effects or for its return value.
Null statements. These statements can be provided where a statement is required by the C++ syntax but where no action is to be taken.
Compound statements. These statements are groups of statements enclosed in curly braces ({ }). They can be used wherever a single statement may be used.
Selection statements. These statements perform a test; they then execute one section of code if the test evaluates to true (nonzero). They may execute another section of code if the test evaluates to false.
Iteration statements. These statements provide for repeated execution of a block of code until a specified termination criterion is met.
Jump statements. These statements either transfer control immediately to another location in the function or return control from the function.
Declaration statements. Declarations introduce a name into a program.
For information on exception handling statements see Exception Handling. Tcp block little snitch.
See also
The switch statement in C++ is a control statement that is useful in a limited number of cases. The switch statement resembles a compound if statement by including a number of different possibilities rather than a single test:
The value of expression must be an integer (int, long, or char). The case values must be constants.
The switch statement is a multiway branch statement. It provides an easy way to forward execution to different parts of code based on the value of the expression. String is the only non-integer type which can be used in switch statement.
What Is Switch Statement In C++
As of the ‘14 standard, they can also be a constant expression.
A switch statement allows a variable to be tested for equality against a list of values. Each value is called a case, and the variable being switched on is checked for each switch case. The syntax for a switch statement in C programming language is as follows −.
The switch statement body consists of a series of case labels and an optional default label. No two constant expressions in case statements can evaluate to the same value. The default label can appear only once. The labeled statements are not syntactic requirements, but the switch statement is meaningless without them.
The overall idea behind switch statements is simple: the switch expression is evaluated to produce a value, and each case label is tested against this value for equality. If a case label matches, the statements after the case label are executed.
C goto Statement In this article, you'll learn about goto statment, how it works and why should it be avoided. In C programming, goto statement is used for altering the normal sequence of program execution by transferring control to some other part of the program.
When the switch statement is encountered, the expression is evaluated and compared to the various case constants. Control branches to the case that matches. If none of the cases match, control passes to the default clause.
Consider the following example code snippet:
Once again, the switch statement has an equivalent; in this case, multiple if statements. However, when there are more than two or three cases, the switch structure is easier to understand.
Switch Case Statement C
The break statements are necessary to exit the switch command. Without the break statements, control falls through from one case to the next. (Look out below!)