Update variable and display it on the view

Hi, I’m new to ionic 2 and I have a problem you guys might think it’s easy.

I have a variable that I want to show in my page, I put that variable between {{ myVar }} and it is display by the smartphone. Till here, no problem. When the value of myVar change because i press a button, the value is updated to the screen too. But when a function does modify the value of myVar, the value of myVar is update in the code (i saw it on console.log) but not in the view of the screen.

Can you guys help me out please, I didn’t find any information about this probleme :frowning: