Put + sign in front of positive numbers in ruby

Question

I like to display a plus sign before positive numbers. Example

2.to_s
# returns +2

and

-2.to_s
# returns -2

Answer 1

Use Kernel#sprintf with a + flag:

sprintf('%d', 11)
# 11
sprintf('%+d', 11)
# +11

or equivalently, String#%:

'%+d<x>' % { x: 23 }
# +23