How to enable button when all textbox was filled by users

hello guys please help me i want to enable button(save and next) when all text boxes was filled by users when not filled then button should be disable how it possible?

you can use the if and else statement to check if the textbox is empty and enable it later!
1)Text box 1.text ≠ empty string instead use not is empty Text box 1.text

we can also do that too

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