How to remove last character of a string in R

In this tutorial, we are going to learn about how to remove the last character of a string in the R language.

Removing the last character

To remove the string’s last character, we can use the built-in substring() function in R.

The substring() function accepts 3 arguments, the first one is a string, the second is start position, third is end position.

Here is an example, that removes the last character t from the month string:

month = 'august'
result = substring(month,1, nchar(month)-1)
print(result)

Output:

"augus"

In the above example, we have passed the 1, nchar(month)-1 as a second and third arguments to the substring() function. so it begins the extraction at position 1 and extracts before the last character position (5) of a string.

The nchar() function is used to caluclate the length of a string in R.