widemul(x, y)

Multiply x and y, giving the result as a larger type.


  1. Multiply two integers and widen the result:

    julia> widemul(10, 20)

    This example multiplies the integers 10 and 20 and widens the result to a larger type.

  2. Multiply two large numbers and handle overflow:

    julia> a = big(10)^50;
    julia> b = big(2)^50;
    julia> widemul(a, b)

    It can handle large numbers and correctly widens the result to accommodate the multiplication.

  3. Multiply a negative number with a positive number:
    julia> widemul(-5, 10)

    It correctly handles multiplication between negative and positive numbers.

Common mistake example:

julia> widemul(3.14, 2.71)
ERROR: MethodError: no method matching widemul(::Float64, ::Float64)

In this example, widemul does not support floating-point numbers. It only works with integers and their wider types. Make sure to provide integer arguments to widemul to avoid such errors.

See Also

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