How to write IF ELSE condition under LWC .html file:

Below is the block of code to use If/Else condition under LWC UI (.html file). Condition variable you can defined under .js file.

<!-- If Condition-->

    <template if:true={your_Variable_defined_in_JS}>

        <!-- Put your UI logic here. -->

    </template>

    <!-- Else Condition-->

    <template if:false={your_Variable_defined_in_JS}>

        <!-- Put your UI logic here. -->

    </template>