# Period minusDays() method in Java with Examples

The minusDays() method of Period class in Java is used to subtract the days from this Period. This functions operates only on DAYS and does not affect YEAR and MONTH.

**Syntax:**

public Period minusDays(long daysToSubtract)

**Parameters:** This method accepts a single parameter *daysToSubtract* which is the number of days to be subtracted from the period.

**Return Value:** This method returns a Period based on provided period in the input

subtracting the specified number of days. It must not be null.

**Exceptions:** It throws an **ArithmeticException**. This exception is caught if numeric overflow occurs.

Below programs illustrate the above method:

**Program 1**:

`// Java code to show the function minusDays()` `// to subtract the number of days from given periods` ` ` `import` `java.time.Period;` `import` `java.time.temporal.ChronoUnit;` ` ` `public` `class` `PeriodClass {` ` ` ` ` `// Function to subtract two given periods` ` ` `static` `void` `subtractDays(Period p1, ` `int` `daystoSubtract)` ` ` `{` ` ` ` ` `System.out.println(p1.minusDays(daystoSubtract));` ` ` `}` ` ` ` ` `// Driver Code` ` ` `public` `static` `void` `main(String[] args)` ` ` `{` ` ` ` ` `// Defining first period` ` ` `int` `year = ` `4` `;` ` ` `int` `months = ` `11` `;` ` ` `int` `days = ` `10` `;` ` ` `Period p1 = Period.of(year, months, days);` ` ` ` ` `int` `daystoSubtract = ` `8` `;` ` ` ` ` `subtractDays(p1, daystoSubtract);` ` ` `}` `}` |

**Output:**

P4Y11M2D

**Program 2**:

`// Java code to show the function minusDays()` `// to subtract the number of days from given periods` `import` `java.time.Period;` `import` `java.time.temporal.ChronoUnit;` ` ` `public` `class` `PeriodClass {` ` ` ` ` `// Function to subtract two given periods` ` ` `static` `void` `subtractDays(Period p1, ` `int` `daystoSubtract)` ` ` `{` ` ` ` ` `System.out.println(p1.minusDays(daystoSubtract));` ` ` `}` ` ` ` ` `// Driver Code` ` ` `public` `static` `void` `main(String[] args)` ` ` `{` ` ` `// Defining first period` ` ` `int` `year = -` `4` `;` ` ` `int` `months = -` `11` `;` ` ` `int` `days = ` `0` `;` ` ` `Period p1 = Period.of(year, months, days);` ` ` ` ` `int` `daystoSubtract = ` `8` `;` ` ` ` ` `subtractDays(p1, daystoSubtract);` ` ` `}` `}` |

**Output:**

P-4Y-11M-8D

**Reference**: https://docs.oracle.com/javase/8/docs/api/java/time/Period.html#minusDays-long-

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