---
title: bitwise.slshift() function
description: >
  `bitwise.slshift()` shifts the bits in `a` left by `b` bits.
  Both `a` and `b` are integers.
menu:
  flux_v0_ref:
    name: bitwise.slshift
    parent: bitwise
    identifier: bitwise/slshift
weight: 101
---

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`bitwise.slshift()` shifts the bits in `a` left by `b` bits.
Both `a` and `b` are integers.



##### Function type signature

```js
(a: int, b: int) => int
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### a
({{< req >}})
Left hand operand.



### b
({{< req >}})
Number of bits to shift.




## Examples

- [Shift bits left in an integer](#shift-bits-left-in-an-integer)
- [Shift bits left in integers in a stream of tables](#shift-bits-left-in-integers-in-a-stream-of-tables)

### Shift bits left in an integer

```js
import "bitwise"

bitwise.slshift(a: 1234, b: 2)// Returns 4936


```


### Shift bits left in integers in a stream of tables

```js
import "bitwise"
import "sampledata"

sampledata.int()
    |> map(fn: (r) => ({r with _value: bitwise.slshift(a: r._value, b: 3)}))

```

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{{% expand "View example input and output" %}}

#### Input data

| _time                | _value  | *tag |
| -------------------- | ------- | ---- |
| 2021-01-01T00:00:00Z | -2      | t1   |
| 2021-01-01T00:00:10Z | 10      | t1   |
| 2021-01-01T00:00:20Z | 7       | t1   |
| 2021-01-01T00:00:30Z | 17      | t1   |
| 2021-01-01T00:00:40Z | 15      | t1   |
| 2021-01-01T00:00:50Z | 4       | t1   |

| _time                | _value  | *tag |
| -------------------- | ------- | ---- |
| 2021-01-01T00:00:00Z | 19      | t2   |
| 2021-01-01T00:00:10Z | 4       | t2   |
| 2021-01-01T00:00:20Z | -3      | t2   |
| 2021-01-01T00:00:30Z | 19      | t2   |
| 2021-01-01T00:00:40Z | 13      | t2   |
| 2021-01-01T00:00:50Z | 1       | t2   |


#### Output data

| _time                | _value  | *tag |
| -------------------- | ------- | ---- |
| 2021-01-01T00:00:00Z | -16     | t1   |
| 2021-01-01T00:00:10Z | 80      | t1   |
| 2021-01-01T00:00:20Z | 56      | t1   |
| 2021-01-01T00:00:30Z | 136     | t1   |
| 2021-01-01T00:00:40Z | 120     | t1   |
| 2021-01-01T00:00:50Z | 32      | t1   |

| _time                | _value  | *tag |
| -------------------- | ------- | ---- |
| 2021-01-01T00:00:00Z | 152     | t2   |
| 2021-01-01T00:00:10Z | 32      | t2   |
| 2021-01-01T00:00:20Z | -24     | t2   |
| 2021-01-01T00:00:30Z | 152     | t2   |
| 2021-01-01T00:00:40Z | 104     | t2   |
| 2021-01-01T00:00:50Z | 8       | t2   |

{{% /expand %}}
{{< /expand-wrapper >}}