Can anyone explain what is happening in this code, Especially in 3rd and 4th line

[kumaabi]

data insure_as2;
infile "U:\STA575\RawData\RawData_dat\insure.dat";
input ID $ 1-4 Name $ 5-18 Policy $ 23-29 Company $ 30-40
PctInsured 48-55 Total 56-63 BalanceDue 64-73;
run;

[kumaabi]

[Kurt_Bremser · Accepted solution]

The two lines contain an INPUT statement. The variable values are read from specified positions (the numbers after each variable name), and the $ sign specifies the preceding variable as character.

See the relevant documentation of column input here.