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The most common use of while is accumulating a result when the loop condition depends on something more complex than a simple range:
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Момент удара ракеты по спутниковой станции в Израиле попал на видео20:56,推荐阅读传奇私服新开网|热血传奇SF发布站|传奇私服网站获取更多信息
Oil markets have had some of the steepest price rises ever recorded as conflict in the Middle East escalated over the last week. Although the world is slowly becoming greener, fossil fuels are still the lifeblood of every economy so when oil and gas prices rise, the effect ripples through almost every aspect of our financial lives. Jillian Ambrose, energy correspondent for the Guardian, explains how the conflict may affect global costs.