Sometimes, when we are writing the logical commands of a part of the main program, we need to change the situation between the two types, if a specific condition happen.
For example, when we click the “ Edit ” button, we can edit the text and disable editing by pressing the “ Edit ” button again.
Or in a Todo list, when the ‘ check ’ is clicked, the task will switch to the DONE state and return to its original state when clicked again.
when the ‘ check ’ is clicked, the task will switch to the DONE state and return to its original state when clicked again.
In this type of change state, we can write the logic with the “ if ” and “ else ” commands. For example, in the first case, we can say “ If the editing button was clicked and it wasn’t on the “Edit” mode, the text becomes editable and if it was on the “Edit” mode when clicked, it would switch to the non-editing mode…. ”, that which includes long commands “ If ” and “ Else ”…
But the point is, in these cases, you can set true or false for it.
“….If the editing mode had a “false state”, the text box can’t be edited…”
By clicking on the button, it should switch to the true mode and be ready for editing…
The simplest way to opposite the default state is considering the “ ! “ phrase like this:
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This article was originally published on The Dev.to on March 16, 2020 and was written by Mohsen Fallahnejad.