Control statements in Java

Control Statement 1.1 sequential structure (most common)

Features: code executes from top to bottom

1.2 Selection structure:

If Judgment statement:

Switch Judgment statement:

Considerations for using the switch statement:

1. A break is required at the end of each statement to prevent the switch from penetrating.

The amount used to judge in a 2.switch statement can only be int, Short,char,byte String (only after Jdk7)

The data followed by 3.Case must be constant.

The advantages of the switch statement: The statement structure is clear, the running rate is fast.

Disadvantages of the switch statement:

If the switch can do not do, switch can do the if must be implemented.

1.3 Cycle Structure

While loop: First judge the execution

Structure:

while (loop condition) {

Loop body.

}

Do and loop: once executed, the loop body is bound to execute once.

Structure:

bo=

Circulation body;

}while (cyclic conditions);

For loop:

Structure:

for (;;) {

Loop body

}

Control statements in Java