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Asked: 2026-05-26T14:33:09+00:00

As we know that 4294967295 is the largest number in unsigned int if I

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As we know that 4294967295 is the largest number in unsigned int if I multiply this number by itself then how to display it? I have tried:

long unsigned int NUMBER = 4294967295 * 4294967295;

but still getting 1 as answer.

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1 Answer

  1. Editorial Team

    You are getting an overflow. Consider the muplication in hexadecimal:

    0xffffffff * 0xffffffff == 0xfffffffe00000001
                                     ^^^^^^^^
                                     only the last 32 bits are returned

    The solution is to use a larger type such as long long unsigned:

    long long unsigned int NUMBER = 4294967295ULL * 4294967295ULL;

    The suffix ULL means unsigned long long.

    See it working online: ideone

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