# + Addition Operator

`+`

Addition Operator

Adds two numeric values together (expression)

## Description

The Addition Operator adds two numeric values together in an expression. Those values are placed either side of the addition operator.

## Examples

### Expression

```
Â» 3+2
5
```

### Statement

```
out (3+2)
Â» 5
```

## Detail

### String Concatenation

Unlike in some other programming languages, the `+`

operator cannot be used to concatenate strings. This is because shells are historically untyped so you cannot always guarantee that numeric-looking value isn't a string. To solve this problem, by default Murex assumes anything that looks like a number is a number when performing addition. Thus overloading the `+`

operator to concatenate strings would lead to a large class of bugs.

```
Â» str = "3"
Â» int = 2
Â» $str + $int
5
```

### Type Safety

For occasions when type safety is more important than the convenience of silent data casting, you can disable the above behaviour via `config`

:

```
Â» config set proc strict-types true
Â» $str + $int
Error in `expr` (0,1): cannot Add with string types
> Expression: $str + $int
> : ^
> Character : 1
> Symbol : Scalar
> Value : '$str'
```

## See Also

- Operators And Tokens: A table of all supported operators and tokens
- Strict Types In Expressions: Expressions can auto-convert types or strictly honour data types
`*`

Multiplication Operator: Multiplies one numeric value with another (expression)`+=`

Add With Operator: Adds the right hand value to a variable (expression)`-`

Subtraction Operator: Subtracts one numeric value from another (expression)`/`

Division Operator: Divides one numeric value from another (expression)`cast`

: Alters the data-type of the previous function without altering its output`config`

: Query or define Murex runtime settings`expr`

: Expressions: mathematical, string comparisons, logical operators`float`

(floating point number): Floating point number (primitive)`int`

: Whole number (primitive)`num`

(number): Floating point number (primitive)

This document was generated from gen/expr/addition-op_doc.yaml.