Python While Loops

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Python While Loops



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Python Loops


Python has two primitive loop commands:



  • while loops


  • for loops


The while Loop



With the while loop we can execute a set of statements as long as a condition is true.




Example


Print i as long as i is less than 6:



i = 1

while i
  print(i)

  i += 1

Run example »


Note: remember to increment i, or else the loop will continue forever.




The while loop requires relevant variables to be ready, in this example we need to define an indexing variable, i,
which we set to 1.



The break Statement



With the break statement we can stop the loop even if the
while condition is true:




Example


Exit the loop when i is 3:



i = 1

while i
  print(i)

  if i == 3:
    break
  i += 1

Run example »







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The continue Statement



With the continue statement we can stop the
current iteration, and continue with the next:




Example


Continue to the next iteration if i is 3:



i = 0

while i
  i += 1

  if i == 3:
    continue
  print(i)

Run example »




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