MATLAB: How can i write from txt files to any array

.txt filesconver from txt to any arrayfrom txt to array

İ have any a txt files.
a001.txt
152 583 -129 -523 125 etc..
i want to use them in an array. i want to use each one like a quantitive number. as a result i want that k array is a.txt
k= 152 583 -129 -523 125
thanks