C - logical or: ||

logical OR works as follows: just in case it's the result false if both inputs are false, in all other cases the result is true. In next table you can find all possibilities:
abx
FalseFalseFalse
FalseTrueTrue
TrueFalse True
TrueTrue True
information about the table: a, b are inputs, x is result

||

Description

par1 || par2
Used keywords: ||

Input


Output

if the first operand is true, then the second operand is not evaluated.

Examples

C

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 = 0 || 0; // a1 = false
a2 = 0 || 1;  // a2 = true
a3 = 1  || 0; // a3 = true
a4 = 1  || 1;  // a4 = true

C

even one example in what situations we can use the operation logical or:
(b || c) || a
a || 1
a>1 || a<100

C

Other pieces of example codes:
a || 1
(10 >a || a<5)
j > 128 || 0

you can find it in the following collections: logical operators
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