Don't understand the error message : Invalid syntax in for statement

Question

I am writing a very simple program to output the 0-10 in numbers using a for loop. However it comes up with a syntax error when I click run, highlighting in red the “=” in the 8th line. I don’t understand why it is wrong? I am using python 3.5.2 in idle mode.

def numbers():
    print ("This program will count to ten, just you wait...")
    import time
    time.sleep(1)
    print ("nnLiterally wait I just need to remember base 10 because I 
    only work in binary!")
    time.sleep(4)
    int(counter) = 0
    for counter <**=** 9: 
    print ("n" + counter)
    counter =  counter + 1

    print ("nnAnd there you go. Told you I could do it. Goodbye :) ")
    time.sleep(2)
    exit()

numbers()

Asked By: Isaac

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Source

Answer 1

This is wrong syntax for for. As per docs:

The for statement is used to iterate over the elements of a sequence (such as a string, tuple or list) or other iterable object.

which is not your case, or you can use range() to create the sequence:

for i in range(1, 10):

yet it’s artificial workaround and while it will work, is not what you should be doing really.

You should use while instead. Docs say:

The while statement is used for repeated execution as long as an expression is true

while counter <= 9:

Answered By: Marcin Orlowski

Answer 2

Try it like this:

def numbers():
    print ("This program will count to ten, just you wait...")
    import time
    time.sleep(1)
    print ("nnLiterally wait I just need to remember base 10 because I only work in binary!")
    time.sleep(4)
    for i in range(1, 10): #11 if you want 10 to be printed
        print i

    print ("nnAnd there you go. Told you I could do it. Goodbye :) ")
    time.sleep(2)

Answered By: zipa

Answer 3

A couple of points. The excerpt:

int(counter) = 0
for counter <**=** 9: 
print ("n" + counter)
counter =  counter + 1

has multiple errors.

int(counter) = 0 is not valid python syntax.
for counter <**=** 9 is not a valid for statement.
The lines print ("n" + counter) and counter = counter + 1 are lacking proper indentation.

Replace those four lines with

for counter in range(10):
    print(counter)

Answered By: Richard Neumann

Don't understand the error message : Invalid syntax in for statement

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