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Python while Loops
Python Loops
Python has two classic loop commands:
whileloopsforloops
The While Loop
With a while loop we can make a set of statements as long as the situation is real.
Example
Print i as long as i is less than 6:
i = 1
while i < 6:
print(i)
i += 1
Note: remember to enlarge i, otherwise the loop will continue permanently.
The while loop requires a variable that is right for you, in this example we need to define the variable variable, i, that we have set to 1.
The break Statement
With a break statement we can stop the loop even if the timing is true:
Example
Exit the loop when i is 3:
i = 1
while i < 6:
print(i)
if i == 3:
break
i += 1
The continue Statement
With an continue statement we can stop the current recurrence, and proceed with the following:
Example
Continue to the next iteration if i is 3:
i = 0
while i < 6:
i += 1
if i == 3:
continue
print(i)
The else Statement
In other words we can use the else code block once the situation is no longer true:
Example
Print a message once the condition is false:
i = 1
while i < 6:
print(i)
i += 1
else:
print("i is no longer less than 6")