Use regular expressions in golang to verify whether the input is a legal electricity bill payment account number

In our daily lives, we often need to use electricity, and the electricity bills we need to pay are inevitable. In order to facilitate everyone's payment of electricity bills, the power company will generate a payment account number for each user. However, sometimes we encounter some problems, such as entering an incorrect account number. What should we do at this time? In order to solve this problem, we can use regular expressions in golang for verification to ensure the legality of the entered electricity bill payment account number.

First, let us take a look at the format of the electricity bill payment account number. Electricity bill payment account numbers usually consist of numbers and are between 10 and 18 digits in length. In addition, the first 4 digits of the electricity bill payment account number are usually the area code, and the following digits are the sequential number. Therefore, we can build a regular expression based on these rules.

In golang, we can use the regular expression method provided by the regexp package for verification. Next, we will implement a simple program to verify whether the input is a legal electricity bill payment account number.

First, we need to import the regexp package:

import "regexp"

Then, we can define a regular expression as follows:

const regExp = "^\d{10,18}$"

This regular expression represents: string Must consist of 10 to 18 digits.

Next, we need to write a function to verify whether the input is a legal electricity bill payment account number. The specific code is as follows:

func ValidateElectricityAccount(account string) bool {
    r, _ := regexp.Compile(regExp)
    return r.MatchString(account)
}

In this function, we first use the Compile() method to compile the regular expression we defined above. Then, we use the MatchString() method to verify whether the entered electricity bill payment account number meets the requirements. If the requirements are met, the function will return true, otherwise it will return false.

Finally, we can write a sample program to test our function. The specific code is as follows:

func main() {
    account := "1234567890"
    if ValidateElectricityAccount(account) {
        fmt.Printf("%s 是合法的电费缴费账户号
", account)
    } else {
        fmt.Printf("%s 不是合法的电费缴费账户号
", account)
    }
}

In this sample program, we pass an electricity bill payment account number to the ValidateElectricityAccount() function for verification. If the account number is legitimate, the program will output a message telling us that the account number is legitimate.

Through the above steps, we have successfully implemented a function to verify the electricity bill payment account number. In daily life, we can use this function to ensure that the electricity bill payment account number we enter is legal and avoid electricity bill payment problems caused by incorrect account numbers.

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