Exercise: Sum of numbers in a file
Let's implement something slightly useful.
In this exercise we have a file called numbers.txt that has numbers in it. Each line is a number.
Our aim is to add the numbers and print the result.
3 7 23 0 -17 98 12
Expected result is 126.
Some of the tools you might need to solve this exercise.
- Open file and read content line-by-line in Ruby
- Convert string to number in Ruby
- For the advanced version:
- map in Ruby
- reduce in Ruby
- Open file in Python