yq/pkg/yqlib/doc/Env Variable Operators.md

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## Read boolean environment variable as a string
Running
```bash
myenv="true" yq eval --null-input 'strenv(myenv)'
```
will output
```yaml
12
```
## Read numeric environment variable as a string
Running
```bash
myenv="12" yq eval --null-input 'strenv(myenv)'
```
will output
```yaml
12
```