# CoffeeScript - Assignment operators

CoffeeScript supports the following assignment operators −

Sr.No Operator and Description Example
1

= (Simple Assignment )

Assigns values from the right side operand to the left side operand

C = A + B will assign the value of A + B into C
2

It adds the right operand to the left operand and assigns the result to the left operand.

C += A is equivalent to C = C + A
3

-= (Subtract and Assignment)

It subtracts the right operand from the left operand and assigns the result to the left operand.

C -= A is equivalent to C = C - A
4

*= (Multiply and Assignment)

It multiplies the right operand with the left operand and assigns the result to the left operand.

C *= A is equivalent to C = C * A
5

/= (Divide and Assignment)

It divides the left operand with the right operand and assigns the result to the left operand.

C /= A is equivalent to C = C / A
6

%= (Modules and Assignment)

It takes modulus using two operands and assigns the result to the left operand.

C %= A is equivalent to C = C % A

Note − Same logic applies to Bitwise operators so they will become like <<=, >>=, >>=, &=, |= and ^=.

## Example

The following example demonstrates the usage of assignment operators in CoffeeScript. Save this code in a file with name assignment _example.coffee

```a = 33
b = 10

console.log "The value of a after the operation (a = b) is "
result = a = b
console.log result

console.log "The value of a after the operation (a += b) is "
result = a += b
console.log result

console.log "The value of a after the operation (a -= b) is "
result = a -= b
console.log result

console.log "The value of a after the operation (a *= b) is "
result = a *= b
console.log result

console.log "The value of a after the operation (a /= b) is "
result = a /= b
console.log result

console.log "The value of a after the operation (a %= b) is "
result = a %= b
console.log result
```

Open the command prompt and compile the .coffee file as shown below.

```c:/> coffee -c assignment _example.coffee
```

On compiling, it gives you the following JavaScript.

```// Generated by CoffeeScript 1.10.0
(function() {
var a, b, result;
a = 33;
b = 10;

console.log("The value of a after the operation (a = b) is ");
result = a = b;
console.log(result);

console.log("The value of a after the operation (a += b) is ");
result = a += b;
console.log(result);

console.log("The value of a after the operation (a -= b) is ");
result = a -= b;
console.log(result);

console.log("The value of a after the operation (a *= b) is ");
result = a *= b;
console.log(result);

console.log("The value of a after the operation (a /= b) is ");
result = a /= b;
console.log(result);

console.log("The value of a after the operation (a %= b) is ");
result = a %= b;
console.log(result);

}).call(this);
```

Now, open the command prompt again and run the CoffeeScript file as shown below.

```c:/> coffee assignment _example.coffee
```

On executing, the CoffeeScript file produces the following output.

```The value of a after the operation (a = b) is
10
The value of a after the operation (a += b) is
20
The value of a after the operation (a -= b) is
10
The value of a after the operation (a *= b) is
100
The value of a after the operation (a /= b) is
10
The value of a after the operation (a %= b) is
0
```
coffeescript_operators_and_aliases.htm