# #For loops
# while
# Until
str= "testing"
i= 1
while str=="testing"
if i==5
break
end
puts "Yes Testing"
i= i+1
end
puts "While condition"
while i<10
puts i.to_s
i=i+1
end
puts "begin while condition similar to do..while in other programming languages"
#While condition begin..while
begin
puts i.to_s
i= i-1
end while i>=5
puts "until condition"
puts "until condition eg.."
until i>10
puts "iterate loop as long as condition remain false..= "+ i.to_s
i= i+1
end
puts "begin .. until loop similar to the do..until in vbscript"
x=15
begin
puts "i value if i>10:.. "+ x.to_s #condition is true.. so until won't be executed but this loop will be executed atleast once
x= x-1
end until x>10
puts "For loop egs:"
for i in (1..5)
puts i.to_s
end
for i in (2..10).step(2)
puts "increment i by 2 = #{i}"
end
puts "decrement for loop eg:"
for i in (7).downto(0)
puts "for loop decrement: #{i}"
end
# error: step can't be negative (ArgumentError)
# for i in (10..1).step(-2)
# puts "decrement i by 2 = #{i}"
# end
puts "each do loop egs: "
(1..5).each do |x|
puts "each do loop value= #{x}"
end
# ++++++++++++++++++++++++++++++++++++++++
(2..10).step do |i|
puts "i in step do #{i}"
end
(1..12).step(3) do |i|
puts "i in step do #{i}"
end
1.step(15, 2) do |x|
puts "increment by 2 where x is: #{x}"
end
15.step(1, -3){
|x| puts ".step decrement by 3 where x is= #{x}"
}
i=6
i.downto(2) do |i|
puts "downto do loop where i is : #{i}"
end
('a'..'e').each do |al|
puts al
end
(1..5).step(2).each do |x| #when the loop increments, we give range first
puts "each do loop value= #{x}"
end
10.step(1, -2) do |x|
print x
end
# ++++++++++++++++++++++++++++++++++++++++
Output:
Yes Testing
Yes Testing
Yes Testing
Yes Testing
While condition
5
6
7
8
9
begin while condition similar to do..while in other programming languages
10
9
8
7
6
5
until condition
until condition eg..
iterate loop as long as condition remain false..= 4
iterate loop as long as condition remain false..= 5
iterate loop as long as condition remain false..= 6
iterate loop as long as condition remain false..= 7
iterate loop as long as condition remain false..= 8
iterate loop as long as condition remain false..= 9
iterate loop as long as condition remain false..= 10
begin .. until loop similar to the do..until in vbscript
i value if i>10:.. 15
For loop egs:
1
2
3
4
5
increment i by 2 = 2
increment i by 2 = 4
increment i by 2 = 6
increment i by 2 = 8
increment i by 2 = 10
decrement for loop eg:
for loop decrement: 7
for loop decrement: 6
for loop decrement: 5
for loop decrement: 4
for loop decrement: 3
for loop decrement: 2
for loop decrement: 1
for loop decrement: 0
each do loop egs:
each do loop value= 1
each do loop value= 2
each do loop value= 3
each do loop value= 4
each do loop value= 5
i in step do 2
i in step do 3
i in step do 4
i in step do 5
i in step do 6
i in step do 7
i in step do 8
i in step do 9
i in step do 10
i in step do 1
i in step do 4
i in step do 7
i in step do 10
increment by 2 where x is: 1
increment by 2 where x is: 3
increment by 2 where x is: 5
increment by 2 where x is: 7
increment by 2 where x is: 9
increment by 2 where x is: 11
increment by 2 where x is: 13
increment by 2 where x is: 15
.step decrement by 3 where x is= 15
.step decrement by 3 where x is= 12
.step decrement by 3 where x is= 9
.step decrement by 3 where x is= 6
.step decrement by 3 where x is= 3
downto do loop where i is : 6
downto do loop where i is : 5
downto do loop where i is : 4
downto do loop where i is : 3
downto do loop where i is : 2
