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I want to create an infinite loop that counts up and down from 0 to 100 to 0 (and so on) and only stops when some convergence criterion inside the loop is met, so basically something like this:
for i in range(0, infinity): for j in range(0, 100, 1): print(j) # (in my case 100 lines of code) for j in range(100, 0, -1): print(j) # (same 100 lines of code as above) Is there any way to merge the two for loops over j into one so that I don't have write out the same code inside the loops twice?
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The continue statement in Python returns the control to the beginning of the while loop. The continue statement rejects all the remaining statements in the current iteration of the loop and moves the control back to the top of the loop. The continue statement can be used in both while and for loops.
The Python for statement iterates over the members of a sequence in order, executing the block each time. Contrast the for statement with the ''while'' loop, used when a condition needs to be checked each iteration or to repeat a block of code forever. For example: For loop from 0 to 2, therefore running 3 times.
The three types of loop control statements are: break statement. continue statement. pass statement.
Overview. Looping allows you to run a group of statements repeatedly. Some loops repeat statements until a condition is False; others repeat statements until a condition is True. There are also loops that repeat statements a specific number of times.
Use the chain method of itertools
import itertools for i in range(0, infinity): for j in itertools.chain(range(0, 100, 1), range(100, 0, -1)): print(j) # (in my case 100 lines of code) As suggested by @Chepner, you can use itertools.cycle() for the infinite loop:
from itertools import cycle, chain for i in cycle(chain(range(0, 100, 1), range(100, 0, -1))): .... If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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