"Go language Programming" learning note three

This is a creation in Article, where the information may have evolved or changed.

Process Control

In the go language, process control is mainly divided into: Select, cycle, jump.
Select: Different operations are performed by different conditions
A loop is a repeating execution.
Jump: Return to an action based on condition
The flow control statements in the go language are:
conditional statements, the corresponding keywords are if, else and else if;
Select the statement, the corresponding keyword is switch, case and select (will be described in the introduction of the channel);
loop statements, corresponding keywords for and range;
Jump statement, the corresponding keyword is goto.
Similarly, there are keywords like break, continue, and Fallthrough in the go language.

Conditional statements:

ifa5 {return0else {return1}

Conditional statements do not need parentheses to enclose conditions ();
The curly braces {} must exist regardless of the statement body.
The left curly brace {must be in the same row as if or else;
After the IF, the conditional statement can be added before the variable initialization statement, use; interval;
In a function that has a return value, the "final" return statement is not allowed to be included in the If...else ... Structure, otherwise the compilation fails:

SELECT statement

switch  I { case   0 : FMT. Printf ( "0" ) case   1 : FMT. Printf ( "1" ) case   2 : fallthrough  case   3 : FMT. Printf ( "3" ) case   4 ,  5 ,  6 : FMT. Printf ( "4, 5, 6" ) default : FMT. Printf ( "Default" )}  

Left Curly brace {must be in the same row as switch;
A conditional expression is not limited to a constant or an integer;
Multiple result options can appear in a single case;
The go language does not need to use break to explicitly exit a case;
The next case will be executed only if the Fallthrough keyword is explicitly added to the case;
You can not set the conditional expression after switch, in which case the entire switch structure with multiple if...else ... The logical function of the same.

Looping statements

0fori0i10i{sum += i}

The loop statement in the go language only supports the FOR keyword, not the while and Do-while
The left curly brace {must be in the same row as for.
The go language does not support multiple assignment statements separated by commas, and multiple variables must be initialized with a parallel assignment.
Provides a more advanced break that can optionally interrupt which loop

for05; j++ {for010; i++ {if5 {break...

Jump statement

funcmyfunc{i := 0HERE:fmt.Println(i)i++if i < 10 {goto HERE}}