Question

Which of the following code segments will display all of the lines in the file object named infile, assuming that it has successfully been opened for reading?
a. while line in infile :
print(line)
b. while infile in line :
print(line)
c.for infile in line :
print(line)
d. for line in infile :
print(line)

Answer 1

Answer:

d.

for line in infile :

   print(line)

Explanation:

for loop is used to iterate through the each line of the file using line variable. The file is accessed using the object infile. For example if the file name is "file.txt" and it is opened in read mode. It contains the following lines:

hi there friend

how are you

what are you doing

Then the above given chunk of code gives the following output

hi there friend

how are you

what are you doing

At each iteration each line of the the file is printed on the output screen. The print() method is used to display these lines in output.