This page summarizes the operational behavior of some common control structures used in, say, the C programming language.

For more detailed information, see C: Goto statement .

In the following:

• statements represent a collection of statements
• expression represents a Boolean expression that evaluates to true or false.

The target of a goto statement (on memory or in a program) is represented by a label.

A label starts with a letter and is followed by letters and/or digits followed by a colon character.

An unconditional goto statement has the following form.

When executed, it will transfer control to the first statement that follows label.

The conditional goto statement has the following form.

and, when executed, if expression is true, then control is transferred to the first statement that follows label.

Some common control structures are presented in two parts.

• The C general form of the control structure.
• The equivalent form using goto statements and labels to show the operational behavior/semantics of the general form of the control structure.

Here is the general syntax of the "if then else" statement

Here is the equivalent goto form.

Here is the general syntax of the "if then" statement

Here is the equivalent goto form.

Here is the general syntax of the "while do" statement

Here is the equivalent goto form.

Here is the general syntax of the "do while" statement

Here is the equivalent goto form.

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