From fa0c7f349d2128ef57a878fa3fb4fd5a10bd91bd Mon Sep 17 00:00:00 2001
From: Chinmaya Krishnan Mahesh <chinmaya.mahesh@disroot.org>
Date: Fri, 29 Jun 2018 17:07:12 +0530
Subject: [PATCH 1/4] add Go implementation of monte carlo

---
 chapters/monte_carlo/code/go/monteCarlo.go | 42 ++++++++++++++++++++++
 chapters/monte_carlo/monte_carlo.md        |  4 +++
 2 files changed, 46 insertions(+)
 create mode 100644 chapters/monte_carlo/code/go/monteCarlo.go

diff --git a/chapters/monte_carlo/code/go/monteCarlo.go b/chapters/monte_carlo/code/go/monteCarlo.go
new file mode 100644
index 000000000..06b00e60e
--- /dev/null
+++ b/chapters/monte_carlo/code/go/monteCarlo.go
@@ -0,0 +1,42 @@
+// Submitted by Chinmaya Mahesh (chin123)
+
+package main
+
+import (
+	"fmt"
+	"math"
+	"math/rand"
+	"time"
+)
+
+func inCircle(x, y float64) bool {
+	if x*x+y*y < 1.0 { // the radius of an unit circle is 1.0
+		return true
+	} else {
+		return false
+	}
+}
+
+func monteCarlo(samples int) {
+	count := 0
+	s := rand.NewSource(time.Now().UnixNano())
+	r := rand.New(s)
+
+	for i := 0; i < samples; i++ {
+		x, y := r.Float64(), r.Float64()
+
+		if inCircle(x, y) {
+			count += 1
+		}
+	}
+
+	var estimate float64
+	estimate = 4.0 * float64(count) / float64(samples)
+
+	fmt.Println("The estimate of pi is", estimate)
+	fmt.Printf("Which has an error of %f%%\n", 100*math.Abs(math.Pi-estimate)/math.Pi)
+}
+
+func main() {
+	monteCarlo(10000000)
+}
diff --git a/chapters/monte_carlo/monte_carlo.md b/chapters/monte_carlo/monte_carlo.md
index 846dcc6f6..229caf123 100644
--- a/chapters/monte_carlo/monte_carlo.md
+++ b/chapters/monte_carlo/monte_carlo.md
@@ -47,6 +47,8 @@ each point is tested to see whether it's in the circle or not:
 [import:7-9, lang:"rust"](code/rust/monte_carlo.rs)
 {% sample lang="d" %}
 [import:2-5, lang:"d"](code/rust/monte_carlo.d)
+{% sample lang="go" %}
+[import:12-18, lang:"go"](code/go/monteCarlo.go)
 {% endmethod %}
 
 If it's in the circle, we increase an internal count by one, and in the end,
@@ -93,6 +95,8 @@ Feel free to submit your version via pull request, and thanks for reading!
 ### D
 {%sample lang="d" %}
 [import, lang:"d"](code/d/monte_carlo.d)
+{%sample lang="go" %}
+[import, lang:"go"](code/go/monteCarlo.go)
 {% endmethod %}
 
 

From 524a3afb7d10b26ca13fa041de94b9518843ed86 Mon Sep 17 00:00:00 2001
From: Chinmaya Krishnan Mahesh <chinmaya.mahesh@disroot.org>
Date: Fri, 29 Jun 2018 17:09:40 +0530
Subject: [PATCH 2/4] Add Go heading before import in monte carlo

---
 chapters/monte_carlo/monte_carlo.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/chapters/monte_carlo/monte_carlo.md b/chapters/monte_carlo/monte_carlo.md
index 229caf123..611107fa5 100644
--- a/chapters/monte_carlo/monte_carlo.md
+++ b/chapters/monte_carlo/monte_carlo.md
@@ -95,6 +95,7 @@ Feel free to submit your version via pull request, and thanks for reading!
 ### D
 {%sample lang="d" %}
 [import, lang:"d"](code/d/monte_carlo.d)
+### Go
 {%sample lang="go" %}
 [import, lang:"go"](code/go/monteCarlo.go)
 {% endmethod %}

From ced67bc7fabbd8c7e7c216d1f537188de6dd3b61 Mon Sep 17 00:00:00 2001
From: Chinmaya Krishnan Mahesh <chinmaya.mahesh@disroot.org>
Date: Fri, 29 Jun 2018 17:47:55 +0530
Subject: [PATCH 3/4] Update monteCarlo.go

---
 chapters/monte_carlo/code/go/monteCarlo.go | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/chapters/monte_carlo/code/go/monteCarlo.go b/chapters/monte_carlo/code/go/monteCarlo.go
index 06b00e60e..bea71ef41 100644
--- a/chapters/monte_carlo/code/go/monteCarlo.go
+++ b/chapters/monte_carlo/code/go/monteCarlo.go
@@ -10,11 +10,7 @@ import (
 )
 
 func inCircle(x, y float64) bool {
-	if x*x+y*y < 1.0 { // the radius of an unit circle is 1.0
-		return true
-	} else {
-		return false
-	}
+	return x*x+y*y < 1.0 // the radius of an unit circle is 1.0
 }
 
 func monteCarlo(samples int) {
@@ -29,9 +25,8 @@ func monteCarlo(samples int) {
 			count += 1
 		}
 	}
-
-	var estimate float64
-	estimate = 4.0 * float64(count) / float64(samples)
+	
+	estimate := 4.0 * float64(count) / float64(samples)
 
 	fmt.Println("The estimate of pi is", estimate)
 	fmt.Printf("Which has an error of %f%%\n", 100*math.Abs(math.Pi-estimate)/math.Pi)

From 9edf0ef367339ea7281f6c048be834d9765e02ca Mon Sep 17 00:00:00 2001
From: Chinmaya Krishnan Mahesh <chinmaya.mahesh@disroot.org>
Date: Fri, 29 Jun 2018 17:48:23 +0530
Subject: [PATCH 4/4] Update monte_carlo.md

---
 chapters/monte_carlo/monte_carlo.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chapters/monte_carlo/monte_carlo.md b/chapters/monte_carlo/monte_carlo.md
index 611107fa5..bbd33671f 100644
--- a/chapters/monte_carlo/monte_carlo.md
+++ b/chapters/monte_carlo/monte_carlo.md
@@ -48,7 +48,7 @@ each point is tested to see whether it's in the circle or not:
 {% sample lang="d" %}
 [import:2-5, lang:"d"](code/rust/monte_carlo.d)
 {% sample lang="go" %}
-[import:12-18, lang:"go"](code/go/monteCarlo.go)
+[import:12-14, lang:"go"](code/go/monteCarlo.go)
 {% endmethod %}
 
 If it's in the circle, we increase an internal count by one, and in the end,