打印空心金字塔

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package main   import "fmt"   func main() {     var totalLevel int = 10     for i := 1; i <= totalLevel; i++ {         for k := 1; k <= totalLevel-i; k++ {             fmt.Print(" ")         }         for j := 1; j <= 2*i-1; j++ {             if j == 1 || j == 2*i-1 || i == totalLevel {                 fmt.Print("*")             } else {                 fmt.Print(" ")             }         }         fmt.Println()     }   }