Go Language Tutorial
Fibonacci series is an integer sequence where every number after the first two is the sum of the two preceding ones.
Fibonacci n'th term is calculated as sum of n-1'th term and n-2'th term.
F{n}=F{n-1}+F{n-2} where F{0} = 0 and F{1} = 1
Reads the number as user input and calculates and displays the Fibonacci series numbers till the user input number.
package main import "fmt" func fibonacci(num int) { var a,b int for a,b=0,1;a<=num;a,b=b,a+b { fmt.Printf("%d\t",a) } fmt.Println() } func main() { var num int fmt.Print("Enter number: ") fmt.Scanf("%d", &num) fibonacci(num) }Output:
$ go build fibonacci.go $ ./fibonacci Enter number: 6 0 1 1 2 3 5 $ ./fibonacci Enter number: 8 0 1 1 2 3 5 8
This go program is same as above code but here variables used in the for loop are not declared. instead of that used (:) to define and auto initialize variable type based on defined value.
package main import "fmt" func fibonacci(num int) { for a,b:=0,1;a<=num;a,b=b,a+b { fmt.Printf("%d\t",a) } fmt.Println() } func main() { var num int fmt.Print("Enter number: ") fmt.Scanf("%d", &num) fibonacci(num) }Output:
$ ./fibonacci Enter number: 8 0 1 1 2 3 5 8
This go program is used to generates the fibonacci series till the number of terms which is provided as user input.
package main import "fmt" func fibonacci(num int) { for i,a,b:=0,0,1;i<num;a,b,i=b,a+b,i+1 { fmt.Printf("%d\t",a) } fmt.Println() } func main() { var num int fmt.Print("Enter number: ") fmt.Scanf("%d", &num) fibonacci(num) }Output:
$ go build fibonacci.go $ ./fibonacci Enter number: 5 0 1 1 2 3 $ ./fibonacci Enter number: 8 0 1 1 2 3 5 8 13