## UINT64 Convert to Unsigned 64-bit Integer

Section: Type Conversion Functions

### Usage

Converts the argument to an unsigned 64-bit Integer. The syntax for its use is

       y = uint64(x)

where `x` is an `n`-dimensional numerical array. Conversion follows the general C rules (e.g., if `x` is outside the normal range for an unsigned 64-bit integer of `[0,2^64-1]`, the least significant 64 bits of `x` are used after conversion to an integer). Note that both `NaN` and `Inf` both map to 0.

### Example

The following piece of code demonstrates several uses of `uint64`.

    --> uint64(200)

    ans =

     200

    -->
    quit

In the next example, an integer outside the range of the type is passed in. The result is the 64 least significant bits of the argument.

    --> uint64(40e9)

    ans =

     40000000000

    -->
    quit

In the next example, a negative integer is passed in. The result is the 64 least significant bits of the argument, \emph{after} taking the 2's complement.

    --> uint64(-100)

    ans =

     18446744073709551516

    -->
    quit

In the next example, a positive double precision argument is passed in. The result is the unsigned integer that is closest to the argument.

    --> uint64(pi)

    ans =

     3

    -->
    quit

In the next example, a complex argument is passed in. The result is the unsigned integer that is closest to the real part of the argument.

    --> uint64(5+2*i)

    ans =

     5

    -->
    quit

In the next example, a string argument is passed in. The string argument is converted into an integer array corresponding to the ASCII values of each character.

    --> uint64('helo')

    ans =

     104 101 108 111

    -->
    quit

In the last example, a cell-array is passed in. For cell-arrays and structure arrays, the result is an error.

    --> uint64({4})
    Error: Cannot convert cell-arrays to any other type.
    -->
    quit