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Golang program to demonstrate the regular expression function FindString()

Here, we are going to demonstrate the regular expression function FindString() in Golang (Go Language).
Submitted by Nidhi, on April 13, 2021 [Last updated : March 04, 2023]

Regular Expression Function FindString() in Golang

Problem Solution:

In this program, we will find substring matched based on the specified pattern within the string and print the matched substrings on the console screen.

Program/Source Code:

The source code to demonstrate the regular expression function FindString() is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

Golang code to demonstrate the example of regular expression function FindString()

// Golang program to demonstrate the
// regular expression function FindString()

package main

import "fmt"
import "regexp"

func main() {
	result, _ := regexp.Compile("L([A-Z]+)N")

	fmt.Println(result.FindString("LAN Network"))
	fmt.Println(result.FindString("The king of forest is LION"))
	fmt.Println(result.FindString("lan network"))
}

Output:

LAN
LION

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, regexp packages then we can use a function related to the fmt and regexp package.

In the main() function, we found substring matched based on the specified pattern within the string using the FindString() function and print the matched substrings on the console screen.

Golang Regular Expressions Programs »

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