[Golang] Introduction to Control Flow

If statement

if (condition1) {

} else if (condition2) {

} else {

}

Note that, the parentheses () can be omitted from an if statement. for example:

package main

import "fmt"

func main() {
	var x = 7
	if num%3 == 0 && num%5 == 0 {
		fmt.Printf("%d is divisible by both 3 and 5\n", x)
	} else if x < 0 {
		fmt.Printf("%d is negative\n", x)
	} else {
		fmt.Printf("%d is positive\n", x)
	}
}

Switch statement

Switch evaluates all the cases from top to bottom until a case succeeds. Once a case succeeds, it runs the block of code specified in that case and then stops the evaluation.

package main

import "fmt"

func main() {
	code := "AT"
	switch code {
	case "TW", "ROC":
		fmt.Println("Taiwan")
	case "AU":
		fmt.Println("Australia")
	case "AT":
		{
			fmt.Println("Austria")
			fmt.Println("There is no kangaroos in Austria")
		}
	default:
		fmt.Println("Other Country")
	}
}

For loop

You can use continue statement to skip running the loop body midway and continue to the next iteration of the loop.
The break statement can be used to stop a loop before its normal termination.

package main

import "fmt"

func main() {
	for i := 100; i < 150; i++ {
		if i%2 == 0 {
			continue
		} else if i%7 == 0 {
			fmt.Printf("%d is a the first multiple of 7\n", i)
			break
		}
		fmt.Printf("%d is a the odd number\n", i)
	}
}