How to sum an array of integer strings?-CodePudding

Question: Transform array string element to integer to sum. My code:

ch = [" 7", "-3", " 10", "0"]

ch.to_i
soma = 0
string.each do |ch| 
    if ch.isdigit() 
        soma  = ch.to_i
    end
end
p(soma)

The error:

Traceback (most recent call last):
main.rb:2:in `<main>': undefined method `to_i' for [" 7", "-3", " 10", "0"]:Array (NoMethodError)
Did you mean?  to_s
               to_a
               to_h

CodePudding user response：

Instead of calling to_i on the array of strings in this line ch.to_i you need to call to_i on each element in the array like this:

numbers = [" 7", "-3", " 10", "0"]
sum = 0
numbers.each do |element| 
  sum  = element.to_i
end
puts sum
#=> 14

Or simplified and using common Ruby idioms:

numbers = [" 7", "-3", " 10", "0"]
numbers.map(&:to_i).sum
#=> 14

CodePudding user response：

sum =0 l=list(input("enter the list you want to add")) for i in l: if i.isdigit(): sum=sum i else: continue print("sum of given integer strings" sum)