12 lines
214 B
Python
12 lines
214 B
Python
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c = 299792458
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while True:
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try:
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m = int(input('Please enter an integer mass in kg: '))
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break
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except ValueError:
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print('Please ensure that your input was an integer!')
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e = m * (c ** 2)
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print(f'e = {e:,}J')
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