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The '''~''' operator works as follows: | The '''~''' operator works as follows: | ||
* The result is true if the | * The result is true if the operand is false | ||
* The result is false if the | * The result is false if the operand is true. | ||
The '''~''' operator is equivalent to the '''NOT''' operator, with one difference: ~ works everywhere whereas NOT will only work in If and PRINT statements | The effect of the '''~''' operator is equivalent to the '''NOT''' operator, with one difference: '''~''' works everywhere whereas '''NOT''' will only work in If and PRINT statements. | ||
'''~''' is | '''~''' is normally used in conjunction with an [[IF Statement]]. | ||
The following examples demonstrates the use of '''~''': | |||
00010 let x = 1 ! 1 is same as true | |||
00020 let y = ~x ! not true evaluates to false, which is 0 in BR | |||
00010 let result = ~( 2 > 5 ) ! 2 > 5 evaluates to false, so ~( 2 > 5 ) evaluates to true, which is 1 in BR | |||
00020 print result ! since result is 1, that's what will print on the screen | |||
<noinclude> | <noinclude> | ||
[[Category: | [[Category:Operations]] | ||
[[Category:Logical | [[Category:Logical Operations]] | ||
</noinclude> | </noinclude> | ||
Latest revision as of 01:35, 15 January 2013
The logical unary negation operator ~ reverses the meaning of its operand. The operand must be numeric. Note that in BR, 1 means true and 0 means false.
The ~ operator works as follows:
- The result is true if the operand is false
- The result is false if the operand is true.
The effect of the ~ operator is equivalent to the NOT operator, with one difference: ~ works everywhere whereas NOT will only work in If and PRINT statements.
~ is normally used in conjunction with an IF Statement.
The following examples demonstrates the use of ~:
00010 let x = 1 ! 1 is same as true 00020 let y = ~x ! not true evaluates to false, which is 0 in BR
00010 let result = ~( 2 > 5 ) ! 2 > 5 evaluates to false, so ~( 2 > 5 ) evaluates to true, which is 1 in BR 00020 print result ! since result is 1, that's what will print on the screen