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CHAPTER 7 Scala Operators An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations. Scala is rich in built-in operators and provides the following types of operators: Arithmetic Operators Relational Operators Logical Operators Bitwise Operators Assignment Operators This chapter will examine the arithmetic, relational, logical, bitwise, assignment and other operators one by one. Arithmetic Operators: There are the following arithmetic operators supported by Scala language: Assume variable A holds 10 and variable B holds 20, then: Operator Description Example + Adds two operands A + B will give 30 - Subtracts second operand from the first A - B will give -10 * Multiplies both operands A * B will give 200 / Divides numerator by de-numerator B / A will give 2 % Modulus Operator and remainder of after an integer division B % A will give 0 Example: Try the following example to understand all the arithmetic operators available in Scala Programming Language. Copy and paste the following Scala program in Test.scala file and compile and run this program. object Test { def main(args: Array[String]) { TUTORIALS POINT Simply Easy Learning
var a = 10; var b = 20; var c = 25; var d = 25; println("a + b = " + (a + b) ); println("a - b = " + (a - b) ); println("a * b = " + (a * b) ); println("b / a = " + (b / a) ); println("b % a = " + (b % a) ); println("c % a = " + (c % a) ); } } This would produce the following result: C:/>scalac Test.scala C:/>scala Test a + b = 30 a - b = -10 a * b = 200 b / a = 2 b % a = 0 c % a = 5 C:/> Relational Operators: There are the following relational operators supported by Scala language Assume variable A holds 10 and variable B holds 20, then: Operator Description Example == Checks if the values of two operands are equal or not, if yes then condition becomes true. (A == B) is not true. != Checks if the values of two operands are equal or not, if values are not equal then condition becomes true. (A != B) is true. > Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true. (A > B) is not true. < Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true. (A < B) is true. >= = B) is not true. (A
Page 1 and 2: Scala Tutorial
Page 3 and 4: ABOUT THE TUTORIAL Scala Tutorial S
Page 5 and 6: FLOATING POINT LITERALS ...........
Page 7 and 8: Scala Strings .....................
Page 9 and 10: CHAPTER 1 Scala Overview Scala, sho
Page 11 and 12: CHAPTER 2 Scala Environment Setup T
Page 13 and 14: $scala -version Scala code runner v
Page 15 and 16: } * This will print 'Hello World' a
Page 17 and 18: forSome If implicit import Lazy Mat
Page 19 and 20: CHAPTER 4 Scala Data Types Scala ha
Page 21 and 22: Characters must not necessarily be
Page 23 and 24: Variable Type Inference: When you a
Page 25: The access to f in class Sub is OK
Page 29 and 30: } } println("a && b = " + (a&&b) );
Page 31 and 32: a >>> 15 C:/> Assignment Operators:
Page 33 and 34: Here, operators with the highest pr
Page 35 and 36: } If the boolean expression evaluat
Page 37 and 38: Nested if...else Statement: It is a
Page 39 and 40: while loop do...while loop for loop
Page 41 and 42: Flow Diagram: Example: object Test
Page 43 and 44: When the above code is compiled and
Page 45 and 46: } } // for loop execution with mult
Page 47 and 48: Flow Diagram: Example: import scala
Page 49 and 50: Infinite Loop: A loop becomes infin
Page 51 and 52: } } return sum A function, which do
Page 53 and 54: When the above code is compiled and
Page 55 and 56: } When the above code is compiled a
Page 57 and 58: } logWithDateBound("message1" ) log
Page 59 and 60: CHAPTER 12 Scala Strings Consider t
Page 61 and 62: } } var str2 = "Tod"; println("Dot
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Page 65 and 66: CHAPTER 13 Scala Arrays Scala provi
Page 67 and 68: C:/> Multi-Dimensional Arrays: Ther
Page 69 and 70: C:/> Scala Arrays Methods: Followin
Page 71 and 72: Scala Lists Scala Lists are quite s
Page 73 and 74: Creating Uniform Lists: You can use
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var s = Set(1,3,5,7) While defining
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C:/> Scala Set Methods: Following a
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elements. 38 39 40 41 42 43 44 45 4
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use two maps with ++ as method colo
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11 12 13 14 15 16 17 18 19 20 21 22
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val t = new Tuple3(1, "hello", Cons
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The method will return Some[Person]
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6 7 8 9 10 11 12 13 14 def filter(p
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Scala Iterator Methods: Following a
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38 39 40 41 42 43 44 45 46 47 48 49
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CHAPTER 15 Scala Classes & Objects
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} } println ("Point y location : "
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CHAPTER 16 Scala Traits A trait enc
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CHAPTER 17 Scala Pattern Matching P
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} // case class, empty one. case cl
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} When the above code is compiled a
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[0-9] Match any digit; same as [012
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CHAPTER 19 Scala Exception Handling
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CHAPTER 20 Scala Extractors An extr
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CHAPTER 21 Scala Files I/O Scala is
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