The values of expressions your code can branch on are very flexible. ![]() Use a single break statement if you don’t intend to execute any code in the body of a matched case. As a result, you must include at least one statement following the colon ( :) of each case label. ![]() If a match is found, the program executes the statements listed within the scope of that case. The control expression of the switch statement is evaluated and then compared with the patterns specified in each case. In addition, Swift provides a do statement to introduce scope, and catch and handle errors, and a defer statement for running cleanup actions just before the current scope exits.Ī semicolon ( ) can optionally appear after any statement and is used to separate multiple statements if they appear on the same line. Loop statements allow a block of code to be executed repeatedly, branch statements allow a certain block of code to be executed only when certain conditions are met, and control transfer statements provide a way to alter the order in which code is executed. There are several types of control flow statements in Swift, including loop statements, branch statements, and control transfer statements. ![]() Compiler control statements allow the program to change aspects of the compiler’s behavior and include a conditional compilation block and a line control statement.Ĭontrol flow statements are used to control the flow of execution in a program. ![]() Simple statements are the most common and consist of either an expression or a declaration. In Swift, there are three kinds of statements: simple statements, compiler control statements, and control flow statements.
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