JAVA introductory system tutorial (4) Basic syntax (2)
# Basic Assignment operator: = Extended assignment operator: =,-=,*=,/=,%= (Convert the value on the left side of the equal sign to the equal sign The result of addition/subtraction on the right side is assigned to the variable on the left side of the equal sign)
We can see that a = 10 here is equivalent to a = a 10
2. Keyboard input: Provide a class through java --- Scanner: text scanner Basic format:
Scanner scanner = new Scanner(System.in);
3. Logical operators
Basic logical operators : Logical AND - & , Logical OR - | , Logical OR - ^ , Logical NOT -! &: If false, then false |: If true, then true ^: Same as false, different as true
!: If not false, then true, if not true, then false, An even number is not itself
4. Arithmetic operators
,-,*,/,% (remainder)
Special: If /--data comes before to participate in the operation: increase by 1 or decrement by 1 first , then perform the operation (assignment)
##6. Select the if statement of the structural statement
1) if (conditional sentence) {}
Example: Enter a number, output the result when it is greater than 8, and end when it is less than 8.
2) if(){}else / if(){}else if
if(statement){statement 1}else{ Statement 2}
Example: Enter 1-24 to determine the period is morning, afternoon and evening
#END
JAVA Getting Started System Tutorial (2) Installing and Using eclipse
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