Brainfuck

'>'

increment the pointer.

'<'

decrement the pointer.

'+'

increment the value at the pointer.

'-'

decrement the value at the pointer.

'.'

output the value at the pointer as utf-8 character.

','

accept one byte of input, storing its value in the mem at the pointer.

'['

if the byte at the pointer is zero, then jump it to the matching ']'

']'

if the byte at the pointer is nonzero, then jump it buck to the matching '['