So basically want to stop a script if an if statement is not met, the statement is this:abbrevationabbrevation
if x > 40 : print ("Please enter a number between 2 and 40")
If the user enters 41 for example, I don't want the program to continue running, but at the moment it does.
import sys
if (x > 40):
print ("Invalid input received. Exiting now")
sys.exit()
else:
# do the result of your program
A simple solution could be to raise an exception that will ultimately stop your script from running
if x > 40 or x < 2:
raise Exception("Please enter a number between 2 and 40")
you can call sys.exit() which will raise SystemExit exception or raise the same exception to play safe
As mad_ mentioned, you can just use exit from the sys module
import sys
if x > 40:
sys.exit()
else:
print('do something')
You can use a break statement. Simply put break in the if condition or the while loop
return and break
sys.exit()sys.exit()should always be inside a condition otherwise rest of the code would automatically become unreachable