Branching statements in Java--classification of program run flow (sequential structure, branch structure, loop structure)

There are three main types of program running in Java:

1, sequential structure: Sequential structure is the execution of each line of code sequentially

2, branching structure: branch structure is branching according to different conditions

3, loop structure: A piece of code is executed according to the conditions of the loop.

Of these, there are two main types of branching structures:

If...else ... Structure and switch ... Structure

The case in switch supports only four types of data:
char (character type)
byte (bit type)
Short (shorter integer type)
int (integral type)

Note that a break is required after the judgment statement inside the switch, otherwise the following statement will continue to execute.

There are two main implementations of loop statements: for loops and while loops.

The execution process of the loop statement:

For

While

Branching statements in Java--classification of program run flow (sequential structure, branch structure, loop structure)