ICS 3U

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ICS 3U

• Math Class ?

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ActionScript 3 Math ClassRounding

• ceil closest integer gt number (rounds up)
• floor closest integer lt number (rounds down)
• round rounds to the nearest integer (follows
  rules of rounding)

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ActionScript 3 A Math ClassCalculations

• max returns the largest number in a list
• min returns the smallest number in a list
• pow will calculate the power of a number
  (specify the number and the exponent)
• sqrt will calculate the squareroot of a number

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ActionScript 3 A Math ClassCommon Constant

• PI contains the number 3.141592653589793
• Can use this is calculations

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ActionScript 3 A Math ClassRandom Numbers

• Random will generate a random number between 0
  and 1
• Need to use floor and some calculations to make
  the random number within a range

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ActionScript 3 A Math ClassExamples

• newnum Math.ceil(num)
• newnum Math.floor(num)
• maxnum Math.max(num1, num2, num3, num4)
• newnum Math.pow(num, 4)
• randnum Math.floor(Math.random() (1 high
  low) low)
• newnum Math.round(num)
• numsqrt Math.sqrt(num)
• circlearea 2 Math.PI (radius2)

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Modulo - A Math Operator

• The modulo math operator calculates the remainder
  of a division.
• Examples
• 8 6 would equal 2 (8 divided by 6 is 1, with 2
  remaining)
• 10 3 would equal 1 (10 divided by 3 is 3, with
  1 remaining)
• 22 11 would equal 0 (22 divided by 11 is 2,
  with 0 remaining)
• When a modulo calculation results in 0, you know
  that the numbers are evenly divisible.
• Common uses are
• to determine if a number is even (num 2 0),
  or
• to separate the digits of a number (onesdigit
  num 10).

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Programming Exercises

• Adapt the Circle Calculation program to use PI
• Adapt your smallest of three numbers to use min.
• Generate a random number with 3 digits and output
  each digit separately. (You do not need a stage!)