title: Reading data file in Fortran with known number of lines but unknown number of entries in each line
body: <p>How can I read the data file containing known number of lines but the number of entries in each line is unknown, e.g. if my data file contain some thing like</p>
  
  <blockquote>
    <p>1 3 4 5 6 -7 8 -9</p>
    
    <p>1 3 5 6</p>
    
    <p>4 5 6 7 8 3 5 6 7 8 4 5 7 8</p>
  </blockquote>
  
  <p>i.e. three lines but the data in each line is unknown. At one time I need the data from one line.  </p>