Ex1. 代入および出力
Ex1_1:hello worldを返せ.
[bobsNewMacBook:~/Desktop/Ruby/ThreeDays] bob% ruby ex0.rb
Hello world!
[bobsNewMacBook:~/Desktop/Ruby/ThreeDays] bob% cat ex0.rb
puts "Hello world!"
Ex1_2:変数への代入とreturn
1+1をaに代入して,その値を返す関数を作れ.
[bobsNewMacBook:~/Desktop/Ruby/ThreeDays] bob% ruby ex2.rb
2
[bobsNewMacBook:~/Desktop/Ruby/ThreeDays] bob% cat ex1.rb
a=1+1
return a
Ex1_3:printf
printfで"ans=2\n"と返す関数を作れ.
expected = "ans=2\n"