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Python While Loops
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This was referenced from w3schools.com.
Python While Loops
Python has two primitive loop commands:
With the while loop we can execute a set of statements as long as a condition
is true.
Print i as long as i is less than 6:
- while loops
- for loops
With the while loop we can execute a set of statements as long as a condition
is true.
Print i as long as i is less than 6:
i = 1
while i < 6:
print(i)
i += 1
while i < 6:
print(i)
i += 1
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:
Exit the loop when i is 3:
true:
Exit the loop when i is 3:
i = 1
while i < 6:
print(i)
if i == 3:
break
i += 1
while i < 6:
print(i)
if i == 3:
break
i += 1
The continue Statement
With the continue statement we can stop the current iteration, and continue
with the next:
Continue to the next iteration if i is 3:
with the next:
Continue to the next iteration if i is 3:
i = 0
while i < 6:
i += 1
if i == 3:
continue
print(i)
while i < 6:
i += 1
if i == 3:
continue
print(i)
The else Statement
With the else statement we can run a block of code once when the condition no
longer is true:
Print a message once the condition is false:
longer is true:
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")
while i < 6:
print(i)
i += 1
else:
print("i is no longer less than 6")
All curriculum credit goes to w3schools.com
