01. Rectangle of 10 x 10 Stars(with or not strings.Repeat())

package main

import "fmt"

func main() {

    for i := 0; i < 10; i++ {
        for j := 0; j < 10; j++ {
            fmt.Print("*")
        }
        fmt.Println()
    }
}

ИЛИ:

package main

import (
    "fmt"
    "strings"
)

func main() {

    for i := 0; i < 10; i++ {
        fmt.Println(strings.Repeat("*", 10))
    }
}