## UINT64 Convert to Unsigned 64-bit Integer

Section: Type Cast 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 =
      <uint64>  - size: [1 1]
     200

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 =
      <uint64>  - size: [1 1]
     40000000000

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 =
      <uint64>  - size: [1 1]
     18446744073709551516

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 =
      <uint64>  - size: [1 1]
     3

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 =
      <uint64>  - size: [1 1]
     5

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 =
      <uint64>  - size: [1 4]

    Columns 1 to 4
     104  101  108  111

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.