Go Language Basics: If,goto,for,switch

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

The difference between Go's If,for,switch and C

People who have a C foundation know that if, for, and switch conditional languages are bracketed. Basic format:

if{}for(语句1;语句2;语句3{}switch(语句){}

In go, these grammatical rules and C still have a difference, summed up as a sentence is to remove the parentheses. The syntax rules are as follows:

if 语句 {}for 语句1;语句2;语句3 {}//跟C一样，这三个语句可以省掉任何一个语句switch 语句 {}

The difference is actually very simple. Due to the absence of parentheses, they have more functionality with C.

If

If there is a strong place to declare a variable in the conditional judgment statement, the scope of the variable can only be within the logical block of the condition, and other places will not work.

if x:=getXdata(); x>10 {//x的作用域只在这个括号里有作用，除了括号就不起作用了。}

For

The C language has a while, Do-while Loop statement. Go is not, how to achieve it. See below:

sum:=1for ;sum<100;{}或者省略;forsum<100 {}

Haha, it's easy.

Goto

Same as the grammar rules of C.

func testFunc(){  ...Here: //以冒号结束作为标签  ...  goto Here//跳转到Here处