INT64 Convert to Signed 64-bit Integer

Section: Type Cast Functions

Usage

Converts the argument to an signed 64-bit Integer. The syntax for its use is
   y = int64(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 a signed 64-bit integer of [-2^63,2^63-1], the least significant 64 bits of x are used after conversion to a signed integer). Note that both NaN and Inf both map to 0.

Example

The following piece of code demonstrates several uses of int64. First, the routine uses
--> int64(100)
ans = 
  <int64>  - size: [1 1]
 100  
--> int64(-100)
ans = 
  <int64>  - size: [1 1]
 -100  

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.

--> int64(40e9)
ans = 
  <int64>  - size: [1 1]
 40000000000  

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

--> int64(pi)
ans = 
  <int64>  - size: [1 1]
 3  

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

--> int64(5+2*i)
ans = 
  <int64>  - 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.

--> int64('helo')
ans = 
  <int64>  - 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.

--> int64({4})
Error: Cannot convert cell-arrays to any other type.