more exercises

flow_ctrl/alt_for.go

@@ -0,0 +1,13 @@
+package main
+
+import "fmt"
+
+func main(){
+	sum := 1
+
+	for ; sum < 1000; {
+		sum +=sum
+	}
+
+	fmt.Println(sum)
+}

flow_ctrl/alt_if.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+	"math"
+	)
+
+
+func pow(x, n, lim float64)  float64{
+	if v := math.Pow(x,n); v < lim {
+		return v
+	}
+	return lim
+}
+
+func main(){
+
+	fmt.Println(pow(3,2,10))
+	fmt.Println(pow(3,3,10))
+}

flow_ctrl/defer-multi.go

@@ -0,0 +1,13 @@
+package main
+
+import "fmt"
+
+func main(){
+	fmt.Println("Starting Program")
+
+	for i:=0;i<10;i++{
+		defer fmt.Println(i)
+		fmt.Println(i)
+	}
+
+}

flow_ctrl/for.go

@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+
+
+func sumUp(n int) (sum int){
+	sum = 0
+	for i:=0;i<1+i;i++{
+		sum += i
+	}
+
+	return
+}
+
+
+func main(){
+	fmt.Println(sumUp(5))
+}

flow_ctrl/if.go

@@ -0,0 +1,18 @@
+package main
+
+import(
+	"fmt"
+	"math"
+)
+
+func sqrt(x float64) string{
+	if x<0{
+		return sqrt(-x) + "i"
+	}
+
+	return fmt.Sprint(math.Sqrt(x))
+}
+
+func main(){
+	fmt.Println(sqrt(2), sqrt(-4) )
+}

flow_ctrl/ifelse.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"math"
+)
+
+func pow(x, n, lim float64) float64{
+	if v:= math.Pow(x,n);v<lim{
+		return v
+	}else{
+		fmt.Printf("%g =< %g", lim, v)
+	}
+
+	return lim
+
+}
+
+
+func main(){
+	fmt.Println(pow(3,2,10))
+	fmt.Println(pow(3,3,20))
+}

flow_ctrl/while.go

@@ -0,0 +1,18 @@
+package main
+
+import "fmt"
+
+
+// For is Golang's while loop
+
+func main(){
+	sum := 0
+
+	for sum < 1000 {
+		sum += sum
+	}
+
+	fmt.Println(sum)
+}
+
+// infinite for loop with for{}

hello_world/basic-types.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"math/cmplx"
+)
+
+var (
+	ToBe bool = false
+	MaxInt uint64 = 1<<64 - 1
+	z complex128 = cmplx.Sqrt(-5 + 12i)
+)
+
+
+func main(){
+	fmt.Printf("Type: %T Value: %v\n", ToBe,ToBe)
+	fmt.Printf("Type: %T Value: %v\n", MaxInt, MaxInt)
+	fmt.Printf("Type: %T Value: %v\n", z,z)
+}

hello_world/numeric-constants.go

@@ -0,0 +1,20 @@
+package main
+
+import "fmt"
+
+const (
+	// Create a huge number by shifting a 1 bit left 100 places.
+	// In other words, the binary number that is 1 followed by 100 zeroes.
+	Big = 1 << 100
+	// Shift it right again 99 places, so we end up with 1<<1, or 2.
+	Small = Big >> 99
+)
+
+func needInt(x int) int { return x*10 + 1 }
+func needFloat(x float64) float64 {
+	return x * 0.1
+}
+
+func main() {
+	fmt.Printf(Big)
+}

hello_world/rand2.go

@@ -0,0 +1,8 @@
+package main 
+import(
+	"fmt"
+	"math/rand"
+) 
+func main(){
+	fmt.Println("My favorite Number is", rand.Intn(20))
+}

hello_world/return-name.go

@@ -0,0 +1,17 @@
+package main
+
+import "fmt"
+
+
+
+func split(sum int) (x,y,z int){
+	x = sum * 4/9
+	y = x * 5/8
+	z = x - y
+	return 
+}
+
+func main(){
+	fmt.Println(split(40))
+}
+

hello_world/type-conv.go

@@ -0,0 +1,8 @@
+package main
+
+import "fmt"
+
+func main(){
+	x := 42
+	fmt.Printf("v is of Type %T", v)
+}

hello_world/type-inf.go

@@ -0,0 +1,7 @@
+package main
+import "fmt"
+
+func main(){
+	v := 40
+	fmt.Printf("V has value %v and type %T\n",v,v)
+}

hello_world/variables.go

@@ -0,0 +1,14 @@
+package main
+
+import "fmt"
+
+var a, b, c bool
+
+var k,x int = 1,2
+
+func main(){
+
+	a := 4
+	fmt.Println(a)
+
+}