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Increase/Decrease Value
Increase or decrease the value of the variable by a step value.
Parameters
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Step value Specifies the value of step for increasing the value of the variable. The step value must be a number.
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Increase/decrease first character for string The option is useful to increase/decrease the alphabet, and it's only available for the string value.
 Notes:
For more information about the expression, please refer to Variable and Expression. If the current value of variable is not a number(example: string "abc"), it will be as number 0.
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