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# Counting number of elements in an array in Julia – count() Method

The `count()` is an inbuilt function in julia which is used to count the number of elements in the specified array for which the given predicate p returns true and if p is omitted, counts the number of true elements in the given collection of boolean values.

Syntax:
count(p, itr)
or
count(itr)

Parameters:

• p: Specified set of instructions.
• itr: Specified collection of boolean values.

Returns: It returns the count of the number of elements in the specified array for which the given predicate p returns true and if p is omitted, counts the number of true elements in the given collection of boolean values.

Example 1:

 `# Julia program to illustrate ``# the use of count() method`` ` `# Getting the count of the number``# of elements in the specified array``# for which the given predicate p ``# returns true.``println(count(i``-``>(i<``=` `3``), [``1``, ``2``, ``3``, ``4``, ``5``]))``println(count(i``-``>(i>``3``), [``1``, ``2``, ``3``, ``4``, ``5``]))``println(count(i``-``>(``2``<``=` `i<``=` `5``), [``1``, ``2``, ``3``, ``4``, ``5``]))``println(count(i``-``>(i>``=` `0``), [``1``, ``2``, ``3``]))`

Output:

```3
2
4
3
```

Example 2:

 `# Julia program to illustrate ``# the use of count() method`` ` `# Getting the counts of number of true elements``# in the given collection of boolean values.``println(count([false, false, false]))``println(count([true, false, true]))``println(count([true, true, true]))`

Output:

```0
2
3
```

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