Q:

Golang program to demonstrate the pointer

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YasminRadwan26
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2022-07-03
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In this program, we will create a variable and a pointer that points to the variable, and then we will access and modify the value of the variable using the pointer.

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YasminRadwan26
2022-07-03
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Program/Source Code:

The source code to demonstrate the pointer is given below. The given program is compiled and executed successfully.

// Golang program to demonstrate the pointer

package main

import "fmt"

func main() {
	var num int = 10
	var ptr *int

	ptr = &num
	fmt.Printf("Num: %d\n", num)
	fmt.Printf("*Ptr: %d\n", *ptr)

	*ptr = 20
	fmt.Printf("Num: %d\n", num)
	fmt.Printf("*Ptr: %d", *ptr)
}

Output:

Num: 10
*Ptr: 10
Num: 20
*Ptr: 20

Explanation:

In the above program, we declare the package main. The main package is used to tell the Go language compiler that the package must be compiled and produced the executable file. Here, we imported the fmt package that includes the files of package fmt then we can use a function related to the fmt package.

In the main() function, we created an integer variable num and an integer pointer ptr. Then we initialized the pointer using the address of variable num. After that, we access the value of the variable using dereferencing operator "*". Then modify and printed the value of the variable on the console screen.

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