isinteger(x) -> Bool

Test whether x or all its elements are numerically equal to some integer


  1. Check if a single value is an integer:

    julia> x = 5;
    julia> isinteger(x)

    This example checks if the value of x is an integer.

  2. Check if all elements of an array are integers:

    julia> arr = [1, 2, 3, 4];
    julia> isinteger(arr)

    It checks if all elements in the array arr are integers.

  3. Handle non-integer values:

    julia> y = 3.14;
    julia> isinteger(y)

    In this example, isinteger returns false because y is not an integer.

  4. Check if elements of a matrix are integers:
    julia> matrix = [1 2; 3 4];
    julia> isinteger(matrix)

    This example checks if all elements in the matrix are integers.

Common mistake example:

julia> z = "10";
julia> isinteger(z)
ERROR: MethodError: no method matching isinteger(::String)

In this example, the isinteger function cannot be applied to a string. It can only be used with numerical types. Make sure to provide valid numeric inputs to isinteger to avoid such errors.

See Also

all, all!, angle, any, any!, falses, ifelse, is, isinf, isinteger, isnan, isperm, ispow2, isreal, trues,

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