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Home/ Questions/Q 8604103
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Editorial Team
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Editorial Team
Asked: June 12, 20262026-06-12T02:29:14+00:00 2026-06-12T02:29:14+00:00

I don’t understand what this code is doing at all, could someone please explain

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I don’t understand what this code is doing at all, could someone please explain it?

long input;  //just here to show the type, assume it has a value stored
unsigned int output( input >> 4 & 0x0F );

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  1. Editorial Team
    Editorial Team
    2026-06-12T02:29:15+00:00Added an answer on June 12, 2026 at 2:29 am

    bitshifts the input 4 bits to the right, then masks by the lower 4 bits.

    Take this example 16 bit number: (the dots are just for visual separation)

    1001.1111.1101.1001 >> 4 = 0000.1001.1111.1101
    
    0000.1001.1111.1101 & 0x0F = 1101 (or 0000.0000.0000.1101 to be more explicit)
    
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