How to represent boolean expressions using if/else statement(s)? Is this right?
Is the expressions
!(a ==b) a!=b equivalent?
i have yes here
!a && b b &&!a
yes
!a || b b ||!a
no
And how to write an if/else statement that stimulates the following expression:
z=(100>y) ? z*2 : z开发者_运维技巧/2;
if (100>y)
z=z*2;
else
z-z/2;
what is z= and y= in the end?
i have z=40 and y=12
How to expand the expression y+=2
y=10, z=20
public static void main(String args[]){
int a = 1;
int b = 2;
int y = 10;
int z = 12;
System.out.println(!(a ==b));
System.out.println(a!=b);
if (100 > y) z = z*2; else z = z/2;
System.out.println(z);
System.out.println(y);
y = y + 2;
System.out.println(y);
}
Output:
The value for !(a ==b) is: true
The value for (a!=b)) is:true
24
10
12
Additional: Some times (?:) conditional operator is a bit tricky this means that it takes three operands. Together, the operands and the ?: symbol form a conditional expression. The first operand (to the left of the ?) is a boolean expression (i.e., a condition that evaluates to a boolean valuetrue or false), the second operand (between the ? and :) is the value of the conditional expression if the boolean expression is True and the third operand (to the right of the :) is the value of the conditional expression if the boolean expression evaluates to false. For example, the statement:
System.out.println( studentGrade >= 60 ? "Passed" : "Failed" );
Your first question is an instance of de Morgan's Laws which you would do well to look up.
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