Shulou(Shulou.com)06/02 Report--

This article shows you what the Go language cycle and judgment and selection sentences are, which are concise and easy to understand, which can definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Learning goal

Master conditional statements, select statements, loop statements

Conditional statement if a < 5 {return 0} else {return 1}

Note:

Conditional statements do not need to use parentheses to include conditions ()

Curly braces {} must exist no matter how many statements are in the body of the statement.

Left curly braces {must be on the same line as if or else

After if, before conditional statements, you can add variable initialization statements, using the; interval

In a function with a return value, it is not allowed to include the "final" return statement in if...else... Structure, otherwise compilation will fail: function ends without a return statement.

The reason for the failure is that the Go compiler cannot find the return statement that terminates the function.

Examples of compilation failures are as follows:

Func example (x int) int {if x = = 0 {return 5} else {return x / / cannot find the return statement that terminates the function}} Select statement switch I {/ / I can only be constant or integer case 0: fmt.Printf ("0") case 1: Fmt.Printf ("1") case 2: fallthrough / / execute case 3: fmt.Printf ("3") case 4 5,6: / / I equals 4 | 5 | fmt.Printf ("4,5,6") default: / / other fmt.Printf ("Default")} / / switch is executed at 6 or the expression: switch {case 0 can be left unset.

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