$inc

Increments the input value by the step argument.

Aliases: $inc, $increment

Options

• input (required) Input value. Must be numeric.
• step (optional) Value to increment by. Default 1.

Example

Template

{
    "n": "$number",
    "nPlus2": {
        "$inc": {
            "input": "${n}",
            "step": 2
        }
    }
}

Output

{
    "n": 100,
    "nPlus2": 102
}