Recap - Dynamic Input

Part of the Fundamentals section of Coddy's R journey — lesson 45 of 78.

Challenge

Easy

Read numbers from input one at a time until the user enters "end". For each number, check if it's positive or negative. Keep track of two separate counts: one for positive numbers and one for negative numbers. Zero should not be counted in either category.

After the loop ends (when "end" is entered), print the counts on separate lines using cat() in this format:

Positive: X
Negative: Y

Where X is the count of positive numbers and Y is the count of negative numbers.

For example, if the inputs are:

5
-3
0
8
-1
-7
end

The output should be:

Positive: 2
Negative: 3

The positive numbers are 5 and 8 (count: 2). The negative numbers are -3, -1, and -7 (count: 3). Zero is not counted.

Try it yourself

# Read input from stdin
con <- file("stdin", "r")

# Initialize counters
positive_count <- 0
negative_count <- 0

# TODO: Write your code here
# Use a repeat loop to read numbers until "end" is entered
# For each input:
#   - Check if it's "end" to break the loop
#   - Convert to number and check if positive or negative
#   - Update the appropriate counter (don't count zero)



# Output the results
cat("Positive:", positive_count, "\n")
cat("Negative:", negative_count, "\n")