How to use operators in JAVA

1. Arithmetic operators

Operator: Common ±*/etc.

Expression: The operators are connected in accordance with java Syntax formula, such as a b

arithmetic operator: - * / %

Note: To get decimals, there must be floating point numbers in it Participate

When printing, char and int are converted according to ASCII code

The " " of string is the string concatenation operator, that is, splicing

2. Assignment operator

Assignment operator: a=10 , don’t say that a is equal to 10, but say that 10 is assigned to the variable a

Note: When performing =, -=, *=, /=, %= operations, type conversion will be automatically forced

3. Auto-increment and auto-decrement operators

is, –
Note: The result of a single i is the same as i, but there is a difference when assigning values: j=i becomes j=i,i;j = i becomes i, j=i

4. Relational operators

Relational operators: ==,! =, >, >=,

5. Logical operators

Logical operators:&, |, ^,! , the output is a Boolean value

Short-circuit logical operators: &&, ||, the result is the same as above. However, if the front of && is false, the following will not be executed; if the front of || is true, the following will not be executed (short-circuit effect)

6. Ternary operator

Format : Relational expression? Relationship 1: Relationship 2

7. Data input

Scanner usage steps: 1. Guide the package; 2. Create the object; 3. Receive data.

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