Adding string and numbers

Ruby
1

i’m new at programing. and i was trying to figure out how you add
numbers. or string? here is the coding

puts ‘what is your first name?’
name1= gets.chomp
puts ‘how about your middle?’
name2= gets.chomp
puts ‘and what about your last name?’
name3= gets.chomp
puts 'did you know there are ‘+name1.length+name2.length+name3.length+ ’
letters in your name?’

the problem is i get the strings combined, not adding the seperate
numbers together.

help?

2

Adam I. wrote:

puts 'did you know there are ‘+name1.length+name2.length+name3.length+ ’
letters in your name?’

the problem is i get the strings combined, not adding the seperate
numbers together.

Try putting parentheses around the addition, like this:

(name1.length+name2.length+name3.length).to_s

-Dana

3

Dana M. wrote:

Adam I. wrote:

puts 'did you know there are ‘+name1.length+name2.length+name3.length+ ’
letters in your name?’

the problem is i get the strings combined, not adding the seperate
numbers together.

Try putting parentheses around the addition, like this:

(name1.length+name2.length+name3.length).to_s

-Dana

hurray that worked!

im not quite sure why it worked though? doesnt it need to be integers to
add together?

4

On Mon, Aug 25, 2008 at 7:03 PM, Adam I. [email protected]
wrote:

letters in your name?’

the problem is i get the strings combined, not adding the seperate
numbers together.

help?

name1.length and friends are numbers, not strings. You might have to
you use to_s.

Here’s a fun inject exercise (q means array of questions, a means
array of answers)…

q = [“what is your first name?”, “how about your middle name?”, “and
what about your last name?”]
puts q.inject([]) {|a, i| puts i; a << gets.chomp}.inject(0) {|s, a| s +
a.size}

Todd

5

On Mon, Aug 25, 2008 at 7:59 PM, Todd B. [email protected]
wrote:

puts 'did you know there are '+name1.length+name2.length+name3.length+ ’

Here’s a fun inject exercise (q means array of questions, a means
array of answers)…

q = [“what is your first name?”, “how about your middle name?”, “and
what about your last name?”]
puts q.inject([]) {|a, i| puts i; a << gets.chomp}.inject(0) {|s, a| s + a.size}

To comply with your original requirements, that last line should be…

puts ‘did you know there are ’ + q.inject([]) {|a, i| puts i; a <<
gets.chomp}.inject(0) {|s, a| s + a.size}.to_s + ’ letters in your
name?’

Very strange looking, but makes the most logical sense to me.

Todd

6

On Mon, Aug 25, 2008 at 7:46 PM, Adam I. [email protected]
wrote:

(name1.length+name2.length+name3.length).to_s

-Dana

hurray that worked!

im not quite sure why it worked though? doesnt it need to be integers to
add together?

(integer + integer + integer).to_s

Inside the parentheses, those are Integer instances being added
together, then the to_s turns the sum into a String object so it will
cooperate with the surrounding strings.

I hope that makes some sense. Sometimes, I don’t even know what I’m
saying :slight_smile:

Todd

7

On Mon, Aug 25, 2008 at 7:59 PM, Todd B. [email protected]
wrote:

puts 'did you know there are '+name1.length+name2.length+name3.length+ ’

Here’s a fun inject exercise (q means array of questions, a means
array of answers)…

q = [“what is your first name?”, “how about your middle name?”, “and
what about your last name?”]
puts q.inject([]) {|a, i| puts i; a << gets.chomp}.inject(0) {|s, a| s + a.size}

To comply with your original requirements, that last line should be…

puts ‘did you know there are ’ + q.inject([]) {|a, i| puts i; a <<
gets.chomp}.inject(0) {|s, a| s + a.size}.to_s + ’ letters in your
name?’

Very strange looking, but makes the most logical sense to me.

Todd