Integer square root: the largest integer m such that m*m <= n.


  1. Calculate the integer square root of a number:

    julia> isqrt(25)
    julia> isqrt(37)

    This example calculates the integer square root of the given numbers 25 and 37, returning the largest integer m such that m * m <= n.

  2. Handle perfect square numbers:

    julia> isqrt(16)
    julia> isqrt(100)

    When the input number is a perfect square, the integer square root is the exact square root value.

  3. Calculate the integer square root of large numbers:
    julia> isqrt(10000000000000000000000000000000000000000000000000000000000000000000)

    The isqrt function can handle large numbers and still provide accurate results.

Common mistake example:

julia> isqrt(3.14)
ERROR: MethodError: no method matching isqrt(::Float64)

In this example, the isqrt function is called with a floating-point number. However, isqrt only works on integers, so passing a float will result in a MethodError. Make sure to provide an integer as the argument to isqrt.

See Also

digits, inf, isdigit, iseven, isfinite, isless, islower, isnumber, isodd, isprime, isqrt, issorted, issubnormal, isxdigit, nan,

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