02. Rectangle of N x N Stars(with or not strings.Repeat())

package main

import "fmt"

func main() {
    var n int
    fmt.Scanln(&n)

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

ИЛИ:

package main

import (
    "fmt"
    "strings"
)

func main() {
    var n int
    fmt.Scanln(&n)

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