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| The four arithmetical operations supported by BR are addition, subtraction, multiplication and division. These operations literally correspond with their respective mathematical operators. All of these mathematical operators are examples of [[Binary operators|binary operators]].
| | #redirect:[[:Category:Arithmetic Operations]] |
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| {|
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| |-valign="top"
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| |width="10%"|'''Operator'''|| '''Effect'''
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| |-valign="top"
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| |width="10%"|'''+'''||addition
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| |-valign="top"
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| |width="10%"|'''+='''||addition of the left operand to the right operand followed by assignment of the result to the left operand
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| |-valign="top"
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| |width="10%"|'''-'''||subtraction
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| |-valign="top"
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| |width="10%"|'''-='''||subtraction of the right operand from the left operand followed by assignment of the result to the left operand
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| |-valign="top"
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| |width="10%"|'''*'''||multiplication
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| |-valign="top"
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| |width="10%"|'''*='''||multiplication of the left operand by the right operand followed by assignment of the result to the left operand
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| |-valign="top"
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| |width="10%"|'''/'''||division
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| |-valign="top"
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| |width="10%"|'''/='''||division of the left operand by the right operand followed by assignment of the result to the left operand
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| |}
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| Now consider two more operators that use the same signs as addition and subtraction, yet each perform a different function.
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| The first one is [[Unary operators|unary plus]] '''+'''. The result of the unary plus operator is the value of its operand. The operand to the unary plus operator must be a numeric variable.
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| For example,
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| 00010 let b = - 1
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| 00020 let a = + b
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| The second one is [[Unary operators|unary minus]] '''-'''. The result of the unary minus operator is the opposite value of its operand. The operand to the unary minus operator must be a numeric variable.
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| For example,
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| 00010 let b = - 1
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| 00020 let a = - b
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| As a result, the value of a becomes 1, which is the opposite of -1.
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| <noinclude>
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| [[Category:Operators]] | |
| </noinclude>
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