ruby 笔记之二

8.

# for 变量 in object

for i in 1..9
  print i," " ;
end
print "/n" ;

#break  终止当前循环

for i in 1..10
  if i == 5 then
    break ;
  end
  print i," " ;
end

print "/n" ;

#next 不执行这一次直接到下一次

for i in 1..10
  if i == 5 then
    next  ;
  end
  print i," " ;
end

 

9.

#times , upto , downto , each ,step



3.times {print "hi nihao/n"}

1.upto(9){|i| print i," " if i < 7}

print "/n" ;

9.downto(1){|i| print i," " if i<7}

print "/n" ;

(1..9).each{|i| print i," " if i < 7}

print "/n" ;

0.step(11,3){|i| print i," " if i < 7}

print "/n" ;