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Golang Recursion | Find Output Programs | Set 2

belongs to collection: Golang Find Output Programs

robaa
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2022-11-14
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This section contains the Golang recursion find output programs (set 2) with their output and explanations.

Program 1:

package main  
import "fmt"  

func main() {  
    static num int= 0
    
    fmt.Println("Num: ",num)

    num++

    if(num==5){
        return
    }
    main()
}

Program 2:

package main

import "fmt"

var num int = 0
var ptr *int = &num

func main() {
	fmt.Println("Num: ", *ptr)
	*ptr++

	if *ptr == 5 {
		return
	}
	main()
}

Program 3:

package main

import "fmt"

var num int = 0
var ptr *int = &num

func main() {
	fmt.Println("Num: ", *ptr)
	*ptr++

	if num == 5 {
		return
	}
	main()
}

Program 4:

package main

import "fmt"

func fun(n int, p int) int {
	if p != 0 {
		return (n * fun(n, p-1))
	} else {
		return 1
	}
}

func main() {
	var result = 0

	result = fun(2, 3)
	fmt.Println("Result: ", result)
}

Program 5:

package main

import "fmt"

func fun(n, p int) int {
	if p != 0 {
		return (n * fun(n, p-1))
	} else {
		return 1
	}
}

func main() {
	var result = 0

	result = fun(2, 3)
	fmt.Println("Result: ", result)
}
Go programming,
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All Answers

robaa
2022-11-14
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Answer Program 1:

Output:

./prog.go:5:12: syntax error: unexpected num at end of statement

Explanation:

The above program will generate a syntax error because the static keyword is not available in the Go language.

 

Answer Program 2:

Output:

Num:  0
Num:  1
Num:  2
Num:  3
Num:  4

Explanation:

Here, we created a global variable num and a pointer ptr. The pointer ptr is initialized with the address of the num variable. Then we called the main() function recursively. Every time value of *ptr increased by 1 and printed value of the num variable. When the value *ptr is equal to 5 then the program gets terminated.

 

Answer  Program 3:

Output:

Num:  0
Num:  1
Num:  2
Num:  3
Num:  4

Explanation:

Here, we created a global variable num and a pointer ptr. The pointer ptr is initialized with the address of the num variable. Then we called the main() function recursively. Every time value of *ptr increased by 1 and printed value of the num variable. When the value num is equal to 5 then the program gets terminated.

 

Answer  Program 4:

Output:

Result:  8

Explanation:

Here, we created two functions fun() and main(). The fun() is a recursive function, which is used to calculate the power of a specified number and return the result to the calling function.

In the main() function, we called the fun() function with the specified number and printed the result on the screen.

 

Answer Program 5:

Output:

Result:  8

Explanation:

Here, we created two functions fun() and main(). The fun() is a recursive function, which is used to calculate the power of a specified number and return the result to the calling function.

 

In the main() function, we called the fun() function with the specified number and printed the result on the screen.

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