And then brother combed the Java Knowledge Point--Process Control (VI)

Branch structure (if...else, switch)

　1. If Else statement format

if　　(conditional expression) {Execute code block;　　}  Elseif(conditional expression) {Execute code block;　　}  Else{execute code block; }

2. Switch statement

Switch(variable) { Caseconstant Value 1: statement 1;  Break;  Caseconstant Value 2: statement 2;  Break;  Caseconstant Value 3: Caseconstant Value 4: Caseconstant Value 5: statement 5;  Break; default: statement;  Break; }

"Knowledge points":

A) switch: When the values of multiple variables go through the same process, you need to follow the notation of constants 3, 4, and 5 to merge cases.

b) If else and switch differences?

If else is suitable for interval comparisons, for example: greater than 60 less than 80 for qualifying, etc.

switch is suitable for specific equivalents. For example: water temperature of 100, indicating that the waters opened,

loop structure (while, Do...while, for )

　　"Knowledge points"

　　　　　For format:

1. Initialization conditions

2. Cyclic conditions

3. Iteration Conditions

4. Circulation body

for (1;2;3) {

4

}

Execution order: 1-2-4-3-2-......-4-3-2

Until the loop condition is not satisfied, exit the current loop

　　Interview Title: Output 99 multiplication table

 for  (int i = 1;i<=9;i++) {       　　for (int j = 1;j<=i;j+++ "*" +i + "=" + I * J　　　　　　+ "\ T");　　　　} System.out.println (""); }

　　While format:

while (2) {

4

3

}

　　

　　Do...while format:

1

bo=

4

3

}while (2)

　　Break and continue tags are used:

And then brother combed the Java Knowledge Point--Process Control (VI)