The predefined variable {random0to1} can be used to generate a random number. You can use it in a variable node, or in a dialogue. If you need to assign a random number to a variable you can use the Variable Node. You can easily drag and drop a variable from variable menu into the variable name field, or type in your variable name. Then the Randomize button will on variable node. You can generate a random number between 0 and 100 by clicking on this button.

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