Loops

For-Loop

Parameter for the For-command:

1. Initial value
2. End value
3. Inkrement

Test-Programm loop_for_1.lua

for variable = 0, 10, 2 do
	print ( variable )
end

The Result:

0
2
4
6
8
10

Test-Programm loop_for_2.lua

for variable = 0, 1, .5 do
	print ( variable )
end

The Result:

0
0.5
1

The loop value doesn't need to be a in whole numbers.

Test-Programm loop_for_2.lua

for variable = 0, 1, .5 do
	print ( variable )
end

The Result:

0
0.5
1

Decrement works also.

There is a special variant of the for-command for tables.

While-Loop

Test-Programm loop_while_1.lua

i = 1
while i  <= 5 do
	 print (i)
	 i = i + 1
end

The Result:

1
2
3
4
5

• Loop with starting condition.
• If the starting condition is false, the block is never executet

Repeat-loop

Test-Programm loop_repeat_1.lua

i = 1
repeat
	 print (i)
	 i = i + 1
until i > 5

The Result:

1
2
3
4
5

• Loop with condition in the end.
• There is at least one execution of the block.

Abortion

You can stop the loop with Break.

Test-Programm loop_break_1.lua

for variable = 1, -1, -.5 do
	if variable == 0 then
		print "Null erreicht"
		break
	end
	print ( variable )
end

The Result:

1
0.5
Null erreicht