Python While Loops

To execute a block of code over and over again, you can use while statement. while statement executes the code in loop as long as the given condition is true.

counter = 1
while counter < 10:
    print(counter)
    counter += 1

# while loop executes as long as counter is less than 10

Break, Continue Statements

break statement exits the loop immediately. continue statement only skips the current loop and continues with the next loop. To get detailed information you can read Python Break, Continue, Pass Statements.

counter = 0
while counter <= 10:
    counter += 1
    if counter % 2 == 1:
        continue
    print(counter)
    
# prints 2, 4, 6, 8, 10
# continue statement skips the loop
# for odd numbers
counter = 0
while counter <= 10:
    counter += 1
    if counter == 5:
        break
    print(counter)

# prints 1, 2, 3, 4
# and exits the loop when counter == 5

Else Statement in While Loops

else block is executed at the end of while loop unless break statement is run during while loop.

while i < 5:
    if colors[i] == "Green":
        print("Green is in the list.")
        break
    i += 1
else:
    print("Green is not found in the list.")
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