From 31ded8668758751b137675220e2fc6d00716102c Mon Sep 17 00:00:00 2001
From: estlop <lopezesteban8@gmail.com>
Date: Wed, 29 Jun 2022 11:02:55 +0100
Subject: [PATCH] docs: Add readme for sum subject

---
 subjects/sum/README.md | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 subjects/sum/README.md

diff --git a/subjects/sum/README.md b/subjects/sum/README.md
new file mode 100644
index 00000000..2675f0be
--- /dev/null
+++ b/subjects/sum/README.md
@@ -0,0 +1,42 @@
+## sum
+
+### Instructions
+
+Write a function that takes two single digit numbers as a string and returns the sum as an int. If one of the arguments is not a single digit number, return 0;
+
+### Expected function
+
+```go
+func Sum(a,b string) int {
+
+}
+```
+
+### Usage
+
+Here is a possible program to test your function :
+
+```go
+package main
+
+import (
+    "piscine"
+    "fmt"
+)
+
+func main() {
+	fmt.Println(piscine.Sum("1", "2"))
+	fmt.Println(piscine.Sum("-4", "0"))
+	fmt.Println(piscine.Sum("7", "-3"))
+}
+```
+
+And its output :
+
+```console
+$ go run . | cat -e
+3$
+-4$
+4$
+$
+```