---
title: bitwise.ulshift() function
description: bitwise.ulshift() shifts the bits in a left by b bits. Both a and b are unsigned integers.
url: https://docs.influxdata.com/flux/v0/stdlib/bitwise/ulshift/
estimated_tokens: 980
product: Flux
version: v0
publisher: InfluxData
canonical: https://docs.influxdata.com/flux/v0/stdlib/bitwise/ulshift/
date: '2024-04-08T16:01:02-06:00'
lastmod: '2024-04-08T16:01:02-06:00'
---

* Flux 0.173.0+

InfluxDB support

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

##### Function type signature

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

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

## Parameters

### a

(Required)
Left hand operand.

### b

(Required)
Number of bits to shift.

## Examples

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

### Shift bits left in an unsigned integer

```
import "bitwise"

bitwise.ulshift(a: uint(v: 1234), b: uint(v: 2))// Returns 4936 (uint)

```

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

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

sampledata.uint()
    |> map(fn: (r) => ({r with _value: bitwise.ulshift(a: r._value, b: uint(v: 3))}))
```

[](#view-example-input-and-output)

View example input and output

#### Input data

|       \_time       |      \_value       |\*tag|
|--------------------|--------------------|-----|
|2021-01-01T00:00:00Z|18446744073709551614| 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|18446744073709551613| 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|18446744073709551600| 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|18446744073709551592| t2  |
|2021-01-01T00:00:30Z|        152         | t2  |
|2021-01-01T00:00:40Z|        104         | t2  |
|2021-01-01T00:00:50Z|         8          | t2  |

[bitwise](/flux/v0/tags/bitwise/)
| _time | _value | *tag |
| --- | --- | --- |
| _time | _value | *tag |
| 2021-01-01T00:00:00Z | 18446744073709551614 | 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 |
| --- | --- | --- |
| _time | _value | *tag |
| 2021-01-01T00:00:00Z | 19 | t2 |
| 2021-01-01T00:00:10Z | 4 | t2 |
| 2021-01-01T00:00:20Z | 18446744073709551613 | t2 |
| 2021-01-01T00:00:30Z | 19 | t2 |
| 2021-01-01T00:00:40Z | 13 | t2 |
| 2021-01-01T00:00:50Z | 1 | t2 |

| _time | _value | *tag |
| --- | --- | --- |
| _time | _value | *tag |
| 2021-01-01T00:00:00Z | 18446744073709551600 | 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 |
| --- | --- | --- |
| _time | _value | *tag |
| 2021-01-01T00:00:00Z | 152 | t2 |
| 2021-01-01T00:00:10Z | 32 | t2 |
| 2021-01-01T00:00:20Z | 18446744073709551592 | t2 |
| 2021-01-01T00:00:30Z | 152 | t2 |
| 2021-01-01T00:00:40Z | 104 | t2 |
| 2021-01-01T00:00:50Z | 8 | t2 |