# How to calculate number of days between two dates in R ?

In this article, we will discuss how to Find the number of days between two dates in the R programming language.

**Example:**

Input:Date_1 = 2020/03/21

Date_2 = 2020/03/22

Output:1

Explanation:In Date_1 and Date_2 have only one difference in day.So output will be 1.

Here we will use seq() function to get the result. This function is used to create a sequence of elements in a Vector. To get the number of days length() function is employed with seq() as an argument.

Syntax:length(seq(from=date_1, to=date_2, by=’day’)) -1

Parameter:

- seq is function generates a sequence of numbers.
- from is starting date.
- to is ending date.
- by is step, increment.

**Example 1:**

## R

`# creating date_1 variable` `# and storing date in it.` `date_1<-` `as.Date` `(` `"2020-10-10"` `)` `# creating date_2 variable` `# and storing date in it.` `date_2<-` `as.Date` `(` `"2020-10-11"` `)` `.` `a = ` `seq` `(from = date_1, to = date_2, by = ` `'day'` `)` `# Here we are finding length of` `# a and we are subtracting 1 because` `# we dont need to include current day.` `length` `(a)-1` |

**Output:**

1

**Example 2:**

## R

`# creating date_1 variable` `# and storing date in it.` `date_1<-` `as.Date` `(` `"2020-01-10"` `)` `# creating date_2 variable` `# and storing date in it.` `date_2<-` `as.Date` `(` `"2020-02-20"` `)` `a = ` `seq` `(from = date_1, to = date_2, by = ` `'day'` `)` `# Here we are finding length of a` `# and we are subtracting 1 because we` `# dont need to include current day.` `length` `(a)-1` |

**Output:**

41