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(Untagged cells will always be shown.)

Hello World!

Comments will be rendered as Markdown. The + and - below ensure that only one code cell is produced, even though the lines are not contiguous

def freeze_warning(temp_c):
    """
    This demonstrates how larger blocks of code can be built compositionally.
    """
    if temp_c < 0:
        print("It is freezing!")


freeze_warning(-10)

It is freezing!