함수 zfill()

1 개요

leading zero

leading 0

ZEROFILL

fill zero

• Left padding a String with Zeros
• Example: zfill(83, 4) → 0083

2 C++

C++ zfill() 구현 문서를 참고하십시오.

#include <iostream>
using namespace std;

string zfill(string s, int len) {
    return string(len-s.length(), '0')+s;
}

int main() {
 	cout << zfill("83", 4); // 0083
}

3 Excel

'0083

="0083"

=TEXT(83,"0000")

=TEXT(83, REPT("0",4))

=REPT("0",4-LEN(A1))&A1

4 Java

자바 zfill() 문서를 참고하십시오.

public class MyClass {
    public static void main(String args[]) {
        int num = 83;
        System.out.println( String.format("%04d", num) ); // 0083
    }
}

public class MyClass {
    public static void main(String args[]) {
        String str = "83";
        System.out.println( String.format("%04d", Integer.parseInt(str)) ); // 0083
    }
}

import org.apache.commons.lang3.StringUtils;
public class MyClass {
    public static void main(String args[]) {
        int num = 83;
        System.out.println( StringUtils.leftPad(String.valueOf(num), 4, "0") ); // 0083
    }
}

import org.apache.commons.lang3.StringUtils;
public class MyClass {
    public static void main(String args[]) {
        String str = "83";
        System.out.println( StringUtils.leftPad(str, 4, "0") ); // 0083
    }
}

5 JavaScript

자바스크립트 padStart() 문서를 참고하십시오.

s = '83';
console.log( s.padStart(4, '0') ); // "0083"

s = 83;
console.log( s.toString().padStart(4, '0') ); // "0083"

6 Go

Go zerofill 문서를 참고하십시오.

package main

import "fmt"

func main() {
	fmt.Printf("%04d\n", 83)
}

7 PHP

$num = 83;
$zero_num = str_pad($num, 4, '0', STR_PAD_LEFT);
echo $zero_num; # 0083

function zfill($num, $length) { return str_pad($num, $length, '0', STR_PAD_LEFT); }
$num = 83;
$zero_num = zfill($num, 4);
echo $zero_num; # 0083

$num = 83;
$zero_num = sprintf('%04d', $num);
echo $zero_num; # 0083

8 Python

Python zfill() 문서를 참고하십시오.

print( "83".zfill(4) )

for x in range(3):
    print( str(x).zfill(4) )

9 Perl

printf("%04d\n", 83); # 0083

10 같이 보기

• 함수 right()
• 함수 padStart() - 왼쪽에 뭔가 추가
• 함수 leading_space() - 왼쪽에 공백 추가
• removing leading zero
• Trailing zero