Description: |
Returns the number of leading zero bits in an integer. | ||

Class: |
Elemental function; Generic | ||

Arguments: |
I must be of type integer. | ||

Results: |
The result type is the same
as I. The result value is the number of leading zeros in the
binary representation of the integer I.
The model for the interpretation of an integer value as a sequence of bits is shown in Section D.3. |

**Examples**

Consider the following:

```
INTEGER*8 J, TWO
PARAMETER (TWO=2)
DO J= -1, 40
TYPE *, LEADZ(TWO**J) ! Prints 64 down to 23 (leading zeros)
ENDDO
END
```

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