Free Pascal - logical negation: not

the logical negation operator is used to determine the oposite value. in our case: if input is true then output is false, and if input is false the result is true. In next table you can find all possibilities:
ax
FalseTrue
TrueFalse
information about the table: a is input, x is result

not

Description

not par1
Used keywords: not

Input


Output

Examples

Free Pascal

in the source code you can find the equivalent of the above table, for easier orientation at the end of each line is a comment which shows the result.
a1 := not false; // a1 = true
a2 := not true; // a2 = false

Free Pascal

even one example in what situations we can use the operation logical negation:
not a
not b and true
not(10 >a or a<5)

Free Pascal

Other pieces of example codes:
repeat
  inc(i);
  if i=5 then
    break;
until not i <10;
not a
repeat dec(i) until not i > 0;

you can find it in the following collections: logical operators
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