Operators
Operators are used to perform operations on values and variables.
Rust supports many common operators, like:
- Arithmetic Operators
- Assignment Operators
- Comparison Operators
- Logical Operators
Arithmetic Operators
Arithmetic operators are used to do basic math:
| Operator | Name | Example | Result |
|---|---|---|---|
| + | Addition | 5 + 3 | 8 |
| - | Subtraction | 5 - 3 | 2 |
| * | Multiplication | 5 * 3 | 15 |
| / | Division | 10 / 2 | 5 |
| % | Remainder (modulus) | 10 % 3 | 1 |
Example
fn main() {
let add = 5 + 3;
let sub = 10 - 4;
let mul = 6 * 2;
let div = 12 / 3;
let rem = 10 % 3;
println!("Add: {}", add);
println!("Sub: {}", sub);
println!("Mul: {}", mul);
println!("Div: {}", div);
println!("Rem: {}", rem);
}Assignment Operators
Assignment operators are used to assign and update values:
| Operator | Example | Same As |
|---|---|---|
| = | x = 5 | Assign 5 to x |
| += | x += 3 | x = x + 3 |
| -= | x -= 2 | x = x - 2 |
| *= | x *= 4 | x = x * 4 |
| /= | x /= 2 | x = x / 2 |
| %= | x %= 2 | x = x % 2 |
Example
fn main() {
let mut x = 10;
println!("Start: {}", x);
x += 5;
println!("After += 5: {}", x);
x -= 2;
println!("After -= 2: {}", x);
x *= 2;
println!("After *= 2: {}", x);
x /= 3;
println!("After /= 3: {}", x);
x %= 4;
println!("After %= 4: {}", x);
}Comparison Operators
Comparison operators compare values and return true or false :
| Operator | Meaning | Example |
|---|---|---|
| == | Equal to | 5 == 5 is true |
| != | Not equal to | 5 != 3 is true |
| > | Greater than | 7 > 3 is true |
| < | Less than | 2 < 5 is true |
| >= | Greater than or equal to | 5 >= 5 is true |
| <= | Less than or equal to | 3 <= 4 is true |
Example
fn main() {
let a = 5;
let b = 10;
println!("5 == 10: {}", a == b);
println!("5 != 10: {}", a != b);
println!("5 < 10: {}", a < b);
println!("5 >= 10: {}", a >= b);
}Logical Operators
Logical operators are used to work with boolean values:
| Operator | Name | Description |
|---|---|---|
| && | AND | true if both values are true |
| OR | true if at least one is true | |
| ! | NOT | inverts the boolean value |
Example
fn main() {
let logged_in = true;
let is_admin = false;
println!("Is regular user: {}", logged_in && !is_admin);
println!("Has any access: {}", logged_in || is_admin);
println!("Not logged in: {}", !logged_in);
}