8 - Boolean Operators

Get an introduction to or review of Boolean operators in Java programming.

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8 - Boolean Operators

Created 3 years ago

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Get an introduction to or review of Boolean operators in Java programming.
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  1. Boolean Operators

    Slide 2 - Boolean Operators

  2. Boolean Operators

    Slide 3 - Boolean Operators

    • To test more complex conditions in an if or if-else statement, we can use one of the three Boolean operators:
    • && (and) – true if all parts are true
    • || (or) – true if any parts are true
    • ! (not) – true if condition is false
  3. Boolean Operators

    Slide 4 - Boolean Operators

    • Some examples:
    • true && true
    • true && false
    • (3 > 5) && (9 < 10)
    • int x = 10;
    • (x > 0) && (x != 20)
    • (x >= 5) && (x < 10)
  4. Boolean Operators

    Slide 5 - Boolean Operators

    • Some examples:
    • true && true
    • true && false
    • (3 > 5) && (9 < 10)
    • int x = 10;
    • (x > 0) && (x != 20)
    • (x >= 5) && (x < 10)
    • true || false
    • false || false
    • (7 == 9) || (12 > 20)
    • int y = -5;
    • (y > 10) || (y < 0)
    • (y > 0) || (y == -2)
  5. Boolean Operators

    Slide 6 - Boolean Operators

    • Some examples:
    • true && true
    • true && false
    • (3 > 5) && (9 < 10)
    • int x = 10;
    • (x > 0) && (x != 20)
    • (x >= 5) && (x < 10)
    • true || false
    • false || false
    • (7 == 9) || (12 > 20)
    • int y = -5;
    • (y > 10) || (y < 0)
    • (y > 0) || (y == -2)
    • !true
    • !false
    • !(3 < 2)
    • int z = 7;
    • !(z > 5)
    • !(z <= 0)
  6. Boolean Operators

    Slide 7 - Boolean Operators

    • Some examples:
    • true && true
    • true && false
    • (3 > 5) && (9 < 10)
    • int x = 10;
    • (x > 0) && (x != 20)
    • (x >= 5) && (x < 10)
    • true || false
    • false || false
    • (7 == 9) || (12 > 20)
    • int y = -5;
    • (y > 10) || (y < 0)
    • (y > 0) || (y == -2)
    • !true
    • !false
    • !(3 < 2)
    • int z = 7;
    • !(z > 5)
    • !(z <= 0)
    • !(true && false)
    • false || (true && true)
    • (5 > 0) && !(7 < 0)
    • int a = 4, b = 5;
    • (a > 0) && (a != b)
  7. The Boolean operators can be used like any other expression, including in an if or if-else.

    Slide 8 - The Boolean operators can be used like any other expression, including in an if or if-else.

    • Boolean Operators
    • if (3 < 5 && 10 > 0) {
    • System.out.println("Yes");
    • }
    • if (-4 < -8 || -9 < -3) {
    • System.out.println("OK!");
    • }
    • int x = 7;
    • if (x == 3 || x == 5) {
    • x++;
    • } else {
    • x--;
    • }
    • System.out.println(x);
    • String str = "Hello";
    • if (!(str.length() > 8)) {
    • System.out.println("Short");
    • }