//if 
 
   
  //if [condition]==true the div will be shown

//for 

  
 {{i}} {{data.title}} 
  
  
   
  //the data contained in an array will be displayed element by element
  //similar to the function .map() in React

// ngStyle (conditional Style)

  
 {{i}} {{data.title}} 

  
 

//if the index of the element is 1 or 0, the background will be red, if it is over 1 the background will be green