# Java Program to Convert Day to Week and Week to Day

In the previous article, we have discussed about Java Program to Convert Hour to Week and Week to Hour

In this article we will see how to convert Day to Week and Week to Day by using Java programming language.

## Java Program to Convert Day to Week and Week to Day

Before jumping into the program let’s know the relationship between Day and Week and how we can convert Day to Week and vice versa.

Day is a period of 24 hours starting from midnight 12 AM to next 12AM which is nothing but 24 hours and Week is a combination of 7 days starting from Monday to Sunday.

1 Day = 0.142857 Week
1 Week = 7 Day

Formula to convert Week to Day.

Day = Week * 7

Formula to convert Day to Week.

Week = Day / 7

Let’s see different ways to convert Day to Week and Week to Day.

### Method-1: Java Program to Convert Day to Week and Week to Day By Using Static Input Value

Approach:

• Declare Day and Week value.
• Then convert Day to Week and Week to Day by using the formula.
• Print result.

Program:

import java.util.*;
public class Main
{
public static void main(String args[])
{
//Scanner class object created
Scanner sc=new Scanner(System.in);
//day value declared
double day = 1;
//week value declared
double week = 1;

//converting day to week
double wk = day / 7;
//converting week to day
double d = week * 7;
//printing result
System.out.println("Value of "+day+" day in week: "+ wk);
System.out.println("Value of "+week+" week in day: "+ d);
}
}
Output:

Value of 1.0 day in week: 0.14285714285714285
Value of 1.0 week in day: 7.0


### Method-2: Java Program to Convert Day to Week and Week to Day By Using User Input Value

Approach:

• Take user input of Day and Week value.
• Then convert Day to Week and Week to Day by using the formula.
• Print result.

Program:

import java.util.*;
public class Main
{
public static void main(String args[])
{
//Scanner class object created
Scanner sc=new Scanner(System.in);
//Taking the value input of double variable day
System.out.println("Enter value of day: ");
double day = sc.nextDouble();
//Taking the value input of double variable week
System.out.println("Enter value of week: ");
double week = sc.nextDouble();

//converting day to week
double wk = day / 7;
//converting week to day
double d = week * 7;
//printing result
System.out.println("Value of "+day+" day in week: "+ wk);
System.out.println("Value of "+week+" week in day: "+ d);
}
}
Output:

Enter value of day:
8
Enter value of week:
3
Value of 8.0 day in week: 1.1428571428571428
Value of 3.0 week in day: 21.0


### Method-3: Java Program to Convert Day to Week and Week to Day By Using User Defined Method

Approach:

• Take user input of Day and Week value.
• Call a user defined method by passing Day and Week value as parameter.
• Inside method convert Day to Week and Week to Day by using the formula.
• Print result.

Program:

import java.util.*;
public class Main
{
public static void main(String args[])
{
//Scanner class object created
Scanner sc=new Scanner(System.in);
//Taking the value input of double variable day
System.out.println("Enter value of day: ");
double day = sc.nextDouble();
//Taking the value input of double variable week
System.out.println("Enter value of week: ");
double week = sc.nextDouble();
//calling user defined method convert()
convert(day, week);
}

//convert() method to convert day to week and vice versa
public static void convert(double day, double week)
{
//converting day to week
double wk = day / 7;
//converting week to day
double d = week * 7;
//printing result
System.out.println("Value of "+day+" day in week: "+ wk);
System.out.println("Value of "+week+" week in day: "+ d);
}
}
Output:

Enter value of day:
28
Enter value of week:
2
Value of 28.0 day in week: 4.0
Value of 2.0 week in day: 14.0


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