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A camera phone is a mobile phone which is able to capture photographs and often record video using one or more built-in digital cameras. It can also send the resulting image over the telephone function. The first commercial camera phone was the Kyocera Visual Phone VP-210, released in Japan in May 1999.
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Interface
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Definition- "The interface of a particular piece of computer software is its presentation on the screen and how easy it is to operate. <em>...the development of better user interfaces.</em>"
A already assigned variable cannot be assigned twice You can make the variable change over to a new one or call a whole new one to assign one without a value or It might be possible to do v=n (v is variable and n is number / value)
Physical Components to a computer are called hardware.