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1.     »ù±¾µÄrubyÓï·¨
1.1      ±äÁ¿¡¢³£Á¿ºÍÀàÐÍ
1)      ¶¨Òå±äÁ¿
±äÁ¿ÀàÐÍ
ÃèÊö
ʾÀý
¾Ö²¿±äÁ¿£¨»òα±äÁ¿£©
ÒÔСд×Öĸ»òÏ»®Ïß¿¨Í·
var    _var
È«¾Ö±äÁ¿
ÒÔ$¿ªÍ·
$var
Àà±äÁ¿
ÀàÖж¨Ò壬ÒÔ@@¿ªÍ·
@@var
ʵÀý±äÁ¿
¶ÔÏóÖж¨Ò壬ÒÔ@¿ªÍ·
@var
³£Á¿
ÒÔ´óд×Öĸ¿ªÍ·
Var
2) ±äÁ¿ÄÚ²å
  ÔÚË«ÒýºÅÄÚʹÓÓ#{±äÁ¿Ãû}”ÄÚ²å±äÁ¿
a = 2
b = 3
puts "#{a} + #{b} = #{a+b}"  #ÊäÈë½á¹ûΪ£º2 + 3 = 5
 
1.2      ×¢ÊÍ
1£©µ¥ÐÐ×¢ÊÍ£ºÒÔ#¿ªÍ·£¬È磺 #×¢ÊÍÄÚÈÝ
2£©¶àÐÐ×¢ÊÍ£ºÔÚ=begin ºÍ =end Ö®¼ä¶¨Ò壬È磺
=begin
×¢ÊÍÄÚÈÝ
=end
1.3    Ñ­»·ºÍ·ÖÖ§
1.3.1        Ìõ¼þÓï¾ä
If ÐÎʽ
unless ÐÎʽ
a =1 if y==3
a=1 unless y!=3
x= if a > 0 then b else c end
x= unless a<=0 then a else b end
 if x<5 then
  a =1
else
   a =2
end
unless x<5 then
   a =2
else
   a =1
end
 
1.3.2        Ñ­»·½á¹¹
#whileÑ­»·
i= 0
while i< list.size do
print “#list[i] ”
I += 1
end
#untilÑ­»·
i= 0
until i == list.size do
print “#list[i]”
i += 1
end
#forÑ­»·
for x in lisy do
 print “#{x}”
end
#eachÑ­»·
list.each do |x|
 print “#{x}”
end
#loopÑ­»·
i = 0
n = list.size-1
loop do
print “#{list[i]}”
i += 1
break id i > n
end
#timesÑ­»·
n = list.size
n.times do |i|
 print “#{list[i]}”
end
#uptoÑ­»·
n =list.size–1
0.upto(n) do |i|
 print “#{list[i]}”
end
#each_indexÑ­»·
list.each_index do |x|
 print “#{list[x]}”
end
 
1.3.3        Òì³£
begin
    x = Math.sqrt(y/z)       
rescue ArgumentError