Golang

Question 1

Go: Import package “fmt” and “math/rand” using ()

Answer 1

import ( “fmt”, “math/rand” )

Question 2

Go: How to call pi value in math using exported names? (math.???)

Answer 2

math.Pi

Question 3

Go: Create function with integer addition for (x,y)

Answer 3

func add(x int, y int) int { return x + y }

Question 4

Go: Create function that returns quotient and remainder for (x,y)

Answer 4

func divide(x, y int) (int, int) { return x / y, x % y }

Question 5

Go: Create function that returns quotient and remainder using named returns

Answer 5

func divide(x, y int) (q, r int) { q = x / y r = x % y return }

Question 6

Go: How to simplify var x int, y int

Answer 6

var x, y int

Question 7

Go: Initialize height, name, male (bool)

Answer 7

height, name, male := 174, “haidar”, true

Question 8

var i int
var str string
var bol bool

What is the value of i, str, and bol?

Answer 8

i = 0

str = “”

bol = false

Question 9

var i int = 42

Convert i to float64

Answer 9

float64(i)

Question 10

v := 42.3 // change me!
fmt.Printf("v is of type %T\n", v)

What’s the output?

Answer 10

v is of type float64

Question 11

Declare constant float64 of pi

Answer 11

const Pi = 3.14

Question 12

I need an x that can be passed to these functions

func needFloat(x float64) float64 {
  return x / 3
}

func needInt(x int) int {
return x / 3
}
~~~
```

How to declare/initialize x?

Answer 12

const x = 10

Question 13

Write a loop that print out (using fmt.Println) 1 to 10

Answer 13

for i := 1; i <= 10; i++ {
	fmt.Println(i)
}

Question 14

Using while in go, print out (using fmt.Println) 1 to 10

Answer 14

i := 1
for i <= 10 {
  fmt.Println(i)
  i++
}

Question 15

Write infinite loop in go!

Answer 15

for {
}

Question 16

Output (using fmt.Println)

if x is below 3, print fizz.

if x is 3 or more, print buzz

Answer 16

if x < 3 {
	fmt.Println("fizz")
} else {
	fmt.Println("buzz")
}

Question 17

Create func mult(x, y, lim int) int

return x * y, but if more than lim, returns lim

Answer 17

func mult(x, y, lim int) int {
	if v := x * y; v < lim {
		return v
	}
	return lim
}

Question 18

Using switch, create a function that returns prefix (Mr. or Mrs.) with gender input

def func(gender string) (string)

Answer 18

func prefix(gender string) string {
	switch gender {
	case "male":
		return "Mr."
	case "female":
		return "Mrs."
	default:
		return ""
	}
}

Question 19

Using defer, print “hello world haidar” in func main() with reverse order in calling!

Answer 19

func main() {
        defer fmt.Println("haidar")
	defer fmt.Println("world")
	defer fmt.Println("hello")
}