10.11: Loop Control Structures

 

 

Break Statement

Stops execution of loop based on a statement

Predict the output if you input a value less than one

fw=float(input("Formula Weight of molecue: "))

while fw < 1:
    break
    print(f' This is impossible as {fw} is smaller than hydrogen')

else: 
   print("you may have a real molecule")
print("you are out of loop")

Hello world!

What do you think will happen if you remove the break?  Note: you can click restart and run all to stop an infinite loop (or ctrl C in thonny)

 

Continue Statement

Skips current iteration and moves onto next

number=(input("Input a number larger than 10: "))
print('This for loop will use the "continue" control structure to print all nonzero digits in the string')
for value in number:
    if value=="0":
        continue
    print(value)

Hello world!

 

 

Pass Statement

stops loop from running

fw=float(input("Formula Weight of molecue: "))
while fw < 1:
    #While writing code you may want to use a pass statement while you figure things out.
    #without the pass you would go into an infinite loop
    pass
print("Out of loop")

Hello world!