ppt 3

• Comments in Java


  Java supports single-line and multi-line comments very similar to C and C++. All characters available inside any comment are ignored by Java compiler.
• print


  leaves the insertion point after the last character of the value of expression
• println

  positions the insertion point at the beginning of the next line
• Java primitive data types

  • byte
  • short
  • int
  • long
  • float
  • double
  • boolean
  • char
• Arithmetic Operators


  • Used in mathematical expressions in the same way as algebra
• Arithmetic Operators

  • +
  • -
  • *
  • /
  • %
• Logical Operators

  • &&
  • ||
  • !
• Assignment Operators


  Used to assign values to variables
• Scanner methods

  • nextInt()
  • nextLong()
  • nextFloat()
  • nextDouble()
  • next()
• Output statement is used to display a prompt or message and show results. In Java, output on the standard output device (the monitor) is accomplished by using the standard output object System.out.
• println – positions the insertion point at the

  beginning

  of the next line.
• Data types – is a set of values together with a set of operations allowed on those values.
• +

  adds values on either side of the operator
• Arithmetic operators are used in mathematical expressions in the same way that they are used in algebra.
• Primitive datatypes are predefined by the language and named by a keyword>,