scala by Example

scalaByExample Notes

chapter 4: Expressions and Simple functions
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There are 2 types of expressions.

1. def x = 5    
2. val x = 5
  Here # 1  represens definition and expression is at the right hand side of the = sign. It is not evaluated immediately.

  Here # 2 represents value expression and its value is evaluated immediately and whenver val is being used; it replaces 
it with pre-computed value of expression.
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Expression Evaluation:
  Expressions have operators and they are evaluated in below order
1. pick the left most operator
2. evaluate its operands
3. apply the operator on operand values
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