How to Check if String contains only Alphabets in R

How to Check if String contains only Alphabets in R ?

Answer

To check if a string contains only alphabets in R, you can use regular expressions or iterate through each character and check if it is an alphabet using functions like grepl and gsub.

✐ Examples

1 Check if String contains only Alphabets using regular expression

In this example,

We create a regular expression pattern that matches alphabets only.
We use the grepl function to check if the string matches the pattern.
If the string contains only alphabets, we set containsOnlyAlphabets to TRUE, otherwise FALSE.
Finally, we print the result to the console.

R Program

str1 <- 'HelloWorld'
pattern <- '^[A-Za-z]+$'
containsOnlyAlphabets <- grepl(pattern, str1)
print(paste('String contains only alphabets:', containsOnlyAlphabets))

Output

String contains only alphabets: TRUE

2 Check if String contains only Alphabets using loop to check each character

In this example,

We create a variable named str2 with a value of 'Hello123'.
We iterate through each character in the string using gsub to remove non-alphabetic characters.
If the resulting string is empty, it contains only alphabets, so we set containsOnlyAlphabets to TRUE, otherwise FALSE.
Finally, we print the result to the console.

R Program

str2 <- 'Hello123'
str2 <- gsub('[^A-Za-z]', '', str2)
containsOnlyAlphabets <- nchar(str2) > 0
print(paste('String contains only alphabets:', containsOnlyAlphabets))

Output

String contains only alphabets: FALSE

Summary

In this tutorial, we learned How to Check if String contains only Alphabets in R language with well detailed examples.

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How to Check if String contains only Alphabets in R

How to Check if String contains only Alphabets in R ?

Answer

✐ Examples

1 Check if String contains only Alphabets using regular expression

R Program

Output

2 Check if String contains only Alphabets using loop to check each character

R Program

Output

Summary

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