나이 계산기 — 정확한 연령을 연, 월, 일 단위로

1from dateutil.relativedelta import relativedelta
2from datetime import date
3
4birth, target = date(2000, 1, 1), date(2020, 1, 1)
5
6age = relativedelta(target, birth)          # calendar age
7print(f"{age.years}y {age.months}m {age.days}d")
8
9total_days = (target - birth).days           # total elapsed days
10print(total_days)                            # 7305
11

1function calendarAge(birth, target) {
2  let months = (target.getUTCFullYear() - birth.getUTCFullYear()) * 12
3             + (target.getUTCMonth() - birth.getUTCMonth());
4  const anchor = new Date(Date.UTC(birth.getUTCFullYear(), birth.getUTCMonth() + months, birth.getUTCDate()));
5  if (anchor > target) months--;
6  return { years: Math.floor(months / 12), months: months % 12 };
7}
8
9const birth = new Date(Date.UTC(2000, 0, 1));
10const target = new Date(Date.UTC(2020, 0, 1));
11const totalDays = Math.floor((target - birth) / 86400000); // 7305
12

1import java.time.LocalDate;
2import java.time.Period;
3import java.time.temporal.ChronoUnit;
4
5LocalDate birth = LocalDate.of(2000, 1, 1);
6LocalDate target = LocalDate.of(2020, 1, 1);
7
8Period age = Period.between(birth, target);   // 20y 0m 0d
9long totalDays = ChronoUnit.DAYS.between(birth, target); // 7305
10

1using System;
2
3var birth = new DateTime(2000, 1, 1);
4var target = new DateTime(2020, 1, 1);
5
6int years = target.Year - birth.Year;
7if (birth.AddYears(years) > target) years--;   // not birthday yet
8long totalDays = (target - birth).Days;         // 7305
9

1#include <chrono>
2using namespace std::chrono;
3
4// C++20 calendar types
5sys_days birth = year{2000}/1/1;
6sys_days target = year{2020}/1/1;
7
8auto total_days = (target - birth).count();     // 7305
9years_months_days ymd_diff{birth, target};      // year_month_day arithmetic
10

1package main
2
3import "time"
4
5func main() {
6    birth := time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC)
7    target := time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC)
8    totalDays := int(target.Sub(birth).Hours() / 24) // 7305
9    _ = totalDays
10}
11

1use chrono::{NaiveDate, Datelike};
2
3let birth = NaiveDate::from_ymd_opt(2000, 1, 1).unwrap();
4let target = NaiveDate::from_ymd_opt(2020, 1, 1).unwrap();
5
6let total_days = (target - birth).num_days(); // 7305
7let years = target.year() - birth.year();     // adjust if birthday not reached
8

1<?php
2$birth = new DateTime('2000-01-01');
3$target = new DateTime('2020-01-01');
4$diff = $birth->diff($target);
5
6echo "{$diff->y}y {$diff->m}m {$diff->d}d\n"; // 20y 0m 0d
7echo $diff->days;                             // 7305
8

1require 'date'
2
3birth  = Date.new(2000, 1, 1)
4target = Date.new(2020, 1, 1)
5
6total_days = (target - birth).to_i           # 7305
7years = target.year - birth.year
8years -= 1 if birth.next_year(years) > target
9

1birth  <- as.Date("2000-01-01")
2target <- as.Date("2020-01-01")
3
4total_days <- as.integer(target - birth)     # 7305
5