BrainFuck

>	increment the data pointer (to point to the next cell to the right).
<	decrement the data pointer (to point to the next cell to the left).
+	increment (increase by one) the byte at the data pointer.
-	decrement (decrease by one) the byte at the data pointer.
.	output the byte at the data pointer.
,	accept one byte of input, storing its value in the byte at the data pointer.
[	if the byte at the data pointer is zero, then instead of moving the instruction pointer forward to the next command, jump it forward to the command after the matching ] command.
]	if the byte at the data pointer is nonzero, then instead of moving the instruction pointer forward to the next command, jump it back to the command after the matching [ command.

"Hello World!"

>+++[-<+++>]<+[->+++++<]
>[-<+>>+>+<<]<--->
++++++[->++++++++<]>-
<++++[->>++++<<]

++[->+++<]>+.
<+++[->++++<]>..
----.+++.
<+++[-<++++>]<-.
>+++[-<---->]<+..
>+++[->----<]>.++.
<+++[->++++<]>-.
<+++[->----<]>.
<+++[->++++<]>+.
<++++[->-----<]>+.
<<-.>>+.<+++[->++++<]>.
--.<<+.
>>++++++.<+++[->---<]>-.
------.<+++[->+++<]>-.
<+++[->++++<]>.
<+++[->---<]>+.
+++.-----.<<.
>>>.<+++++.<++++[->----<]>-.
<+++[->+++<]>-.+++++.
>++++.<+++++++.
<++++[->----<]>--.
<+++[->+++<]>-.

Run It

• http://fatiherikli.github.io/brainfuck-visualizer/
• http://copy.sh/brainfuck/

My Fucking Codes

Class	Name	Description
Basic		Basic functions
	clean(current)	Clear current cell
	copy(source, target)	Copy cell to next
Algorithm		Algorithm functions
	swap(left, right)	Swap two cells #0 and #1
	max(a, b)	Compare cells #0 and #1, save the maximum in #2
	min(a, b)	Compare cells #0 and #1, save the minimum in #2
	sort(array)	Sort the array starts from cell #1, head(#0) and tail are 0
Math		Math functions
	add(summand, addend, sum)	Add cell #0 with #1, save the result in #2
	minus(minuend, subtrahend, difference)	Minus cell #0 with #1, save the result in #2
	multiply(multiplicand, multiplier, product)	Multiply cell #0 with #1, save the result in #2
	divide(numerator, denominator, quotient, remainder)	Divide cell #0 with #1, save quot in #2 and rem in #3
	pow(x, n)	Multiply x(#0) for n(#1) times, save the result in #2
String		String functions
	gets(str)	Get string from stdin(with End Marker in cell #0 when start)