• If block with curly braces, delimits and segregates the blocks
  
• If block without curly braes, treats one block
  
• if-else block, when if block  condition is logically in correct then else block is considered.
  
  
   
• switch block
  
• while (true condition)
  
  
  
• do--while
  

Java performs conversation from lower to higher type implicitly

• double = int ; // implicit way
  
• float = int; //implicit way
  
• float= (float) double; // explicit way