Very often, I encounter a situation in which I need to loop through a collection in Java. While looping through it sequentially, I usually want to use a temporal loop count variable as a variable with which I will be working inside the loop.

Java 8 come with beautiful solution on this pattern. It is called `IntStream`

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## Example of IntStream range() method

Static method `range(startInclusive, endExclusive)`

of `IntStream`

class returns a sequential ordered of integer numbers from range of **startInclusive (inclusive)** to **endExclusive (exclusive)** by an incremental step of 1. Therefore *startInclusive* is inclusive initial value and *endInclusive* is exclusive upper bound.

All this is equivalent of sequence increasing values sequentially using a for loop as follows:

`for (int i = startInclusive; i < endInclusive ; i++) { ... }`

**Example code:**

IntStream intStream = IntStream.range(1, 5);

intStream.forEach(i -> {

System.out.print(i + " ");

});

**Example output:**

`1 2 3 4 `

## Example of IntStream rangeClosed() method

Static method `rangeClosed(startInclusive, endInclusive)`

of `IntStream`

class returns a sequential ordered of integer numbers from range of **startInclusive (inclusive)** to **endInclusive (inclusive)** by an incremental step of 1. Therefore *startInclusive* is inclusive initial value and *endInclusive* is inclusive upper bound.

All this is equivalent of sequence increasing values sequentially using a for loop as follows:

`for (int i = startInclusive; i <= endInclusive ; i++) { ... }`

**Example code:**

IntStream intStream = IntStream.rangeClosed(1, 5);

intStream.forEach(i -> {

System.out.print(i + ", ");

});

**Example output:**

`1 2 3 4 5 `