Extract first 10 lowercase, last 10 uppercase, and 22nd-24th uppercase letters in R

R Programming: Basic Exercise-8 with Solution

Write a R program to extract first 10 english letter in lower case and last 10 letters in upper case and extract letters between 22^nd to 24^th letters in upper case.

Note: Use built-in datasets letters and LETTERS.

Sample Solution :

R Programming Code :

# Print a message indicating the first 10 letters in lower case
print("First 10 letters in lower case:")

# Get the first 10 letters of the alphabet in lower case
t = head(letters, 10)

# Print the first 10 letters in lower case
print(t)

# Print a message indicating the last 10 letters in upper case
print("Last 10 letters in upper case:")

# Get the last 10 letters of the alphabet in upper case
t = tail(LETTERS, 10)

# Print the last 10 letters in upper case
print(t)

# Print a message indicating the letters between the 22nd and 24th in upper case
print("Letters between 22nd to 24th letters in upper case:")

# Get the letters between the 22nd and 24th positions in upper case
e = tail(LETTERS[22:24])

# Print the letters between the 22nd and 24th positions in upper case
print(e)

Output:

[1] "First 10 letters in lower case:"
 [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j"
[1] "Last 10 letters in upper case:"
 [1] "Q" "R" "S" "T" "U" "V" "W" "X" "Y" "Z"
[1] "Letters between 22nd to 24th letters in upper case:"
[1] "V" "W" "X"                         

Explanation:

• print("First 10 letters in lower case:")
  Displays a message indicating the upcoming output.
• t = head(letters, 10)
  Extracts the first 10 letters from the letters dataset (which contains lowercase English letters).
• print(t)
  Prints the first 10 lowercase letters.
• print("Last 10 letters in upper case:")
  Displays a message indicating the upcoming output.
• t = tail(LETTERS, 10)
  Extracts the last 10 letters from the LETTERS dataset (which contains uppercase English letters).
• print(t)
  Prints the last 10 uppercase letters.
• print("Letters between 22nd to 24th letters in upper case:")
  Displays a message indicating the upcoming output.
• e = tail(LETTERS[22:24])
  Extracts the 22nd to 24th uppercase letters from the LETTERS dataset and stores them in e.
• print(e)
  Prints the letters between the 22nd and 24th positions in uppercase.

R Programming Code Editor:

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