diff --git a/eBook/07.5.md b/eBook/07.5.md
index 99c53a9..9418b23 100644
--- a/eBook/07.5.md
+++ b/eBook/07.5.md
@@ -9,11 +9,11 @@ package main
 import "fmt"
 
 func main() {
-	sl_from := []int{1, 2, 3}
-	sl_to := make([]int, 10)
+	slFrom := []int{1, 2, 3}
+	slTo := make([]int, 10)
 
-	n := copy(sl_to, sl_from)
-	fmt.Println(sl_to)
+	n := copy(slTo, slFrom)
+	fmt.Println(slTo)
 	fmt.Printf("Copied %d elements\n", n) // n == 3
 
 	sl3 := []int{1, 2, 3}
diff --git a/eBook/examples/chapter_7/copy_append_slice.go b/eBook/examples/chapter_7/copy_append_slice.go
index a26e22d..aab559f 100644
--- a/eBook/examples/chapter_7/copy_append_slice.go
+++ b/eBook/examples/chapter_7/copy_append_slice.go
@@ -3,11 +3,11 @@ package main
 import "fmt"
 
 func main() {
-	sl_from := []int{1, 2, 3}
-	sl_to := make([]int, 10)
+	slFrom := []int{1, 2, 3}
+	slTo := make([]int, 10)
 
-	n := copy(sl_to, sl_from)
-	fmt.Println(sl_to)                    // output: [1 2 3 0 0 0 0 0 0 0]
+	n := copy(slTo, slFrom)
+	fmt.Println(slTo)                    // output: [1 2 3 0 0 0 0 0 0 0]
 	fmt.Printf("Copied %d elements\n", n) // n == 3
 
 	sl3 := []int{1, 2, 3}