Character by Character [duplicate]

Question

Your program must take in a string like:

test string

And must output each character adding one at a time like this:

t
te
tes
test
test 
test s
test st
test str
test stri
test strin
test string

notice how spaces count!

Good luck! Least Bytes win. ~N

Answer 1

05AB1E, 3 bytes

Uses CP-1252 encoding.

.p»

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Explanation

     # implicit input
.p   # list of prefixes
  »  # join by newlines

Answer 2

MATL, 6 bytes

"GX@:)

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         % Implicit input
"        % For each
  G      %   Push input again
  X@:    %   Push [1 2 ... k] where k is iteration index
  )      %   Use as index into the string
         % End for each
         % Implicit display

Answer 3

Brachylog, 5 bytes

@[@w\

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Assuming that a trailing new line is acceptable

Explanation

@[       Take a prefix of the Input
  @w     Write it to STDOUT followed by a linebreak
    \    False: try another prefix of the input

Answer 4

Pyth, 3 bytes

j._

Try it here.

j       Join by newlines
 ._     all prefixes of implicit input