Reverse number using While loop in R

R Programming: Control Structure Exercise-16 with Solution

Write a R program to find the reverse of a given number using a while loop.

Sample Solution :

R Programming Code :

# Define a function to find the reverse of a given number using a while loop
reverse_number <- function(number) {
    # Initialize variables
    reverse <- 0
    
    # Iterate until the number becomes 0
    while (number != 0) {
        # Extract the last digit of the number
        digit <- number %% 10
        
        # Append the digit to the reverse number
        reverse <- reverse * 10 + digit
        
        # Remove the last digit from the number
        number <- number %/% 10
    }
    
    # Return the reverse of the given number
    return(reverse)
}

# Test the function with an example input
number <- 12345678  # Example number to find its reverse
reversed_number <- reverse_number(number)

# Print the result
cat("Reverse of", number, "is:", reversed_number, "\n")

Output:

Reverse of 12345678 is: 87654321           

Explatnaion:

In the exercise above,

• The "reverse_number()" function takes a positive integer 'number' as input and finds its reverse.
• It initializes 'reverse' to 0.
• Using a while loop, it iterates until the 'number' becomes 0.
• In each iteration, it extracts the last digit of the 'number' using the modulus operator (%%) and appends it to the 'reverse' number by multiplying 'reverse' by 10 and adding the extracted digit.
• After appending all digits, it removes the last digit from the 'number' using integer division (%/%).
• Once the 'number' becomes 0, the reverse of the given number is obtained.

R Programming Code Editor:

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