# POPCNT

Elemental Intrinsic Function (Generic): Returns the number of 1 bits in the integer argument.

result = POPCNT (i)

i | (Input) Must be of type integer or logical.

## Results

The result type and kind are the same as i. The result value is the number of 1 bits 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 Model for Bit Data.

## Example

If the value of I is B'0...00011010110', the value of POPCNT(I) is 5.

Parent topic: O to P