CSE110 Lecture 06

Principles of Programming with Java
Math class
(202205)

Transcript

1. CSE110
   Principles of Programming
   with Java
   Lecture 06:
   Math class
   Javier Gonzalez-Sanchez
   javiergs@asu.edu
   javiergs.engineering.asu.edu | javiergs.com
   Office Hours: By appointment
   

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2. Previously
   

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3. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 3
   + operator
   • If two operands of + are numbers, it performs an
   arithmetic addition.
   • If at least one of operands of + is a string, it performs
   a string concatenation.
   • Examples:
   o 2 + 3 will be 5
   o 2 + “ apples” will be “2 apples”
   o “number ” + 5 will be “number 5”
   o “we have “ + 2 + 3 will be “we have 23”
   o “we have “ + (2 + 3) will be “we have 5”
   

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4. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 4
   Example
   

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5. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 5
   Example
   

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6. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 6
   One more thing
   

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7. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 7
   One more thing
   

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8. More Instructions
   

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9. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 9
   Program
   public class MyProgram {
   }
   public static void first()
   {
   }
   public static void second()
   {
   }
   public static
   void main(String[]args) {
   first();
   System.out.println(“”);
   }
   System.out
   println()
   Java API
   Math
   pow()
   sqrt()
   

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10. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 10
    Math class
    • The Math class contains various mathematical
    methods.
    • To compute √10
    double x = Math.sqrt(10.0);
    • To compute 25.6
    double ans2 = Math.pow(2.0, 5.6);
    

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11. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 11
    Math class
    

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12. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 12
    Examples
    

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13. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 13
    Program
    public class MyProgram {
    }
    public static void first()
    {
    }
    public static void second()
    {
    }
    public static
    void main(String[]args) {
    first();
    System.out.println(“”);
    }
    System.out
    println()
    Java API
    Math
    pow()
    sqrt()
    public static double PI = 3.141592… ;
    

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14. Javier Gonzalez-Sanchez | CSE110 | Summer 2020 | 14
    Homework
    Read Chapter 2
    

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15. CSE110 - Principles of Programming
    Javier Gonzalez-Sanchez
    javiergs@asu.edu
    Summer 2022
    Disclaimer. These slides can only be used as study material for the class CSE110 at ASU. They cannot be distributed or used for another purpose.
    

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