The difference between || and && in C language

In C language, the || operator is true if at least one of its operands is true, while the && operator is true if all of its operands are true. || ignores subsequent true operands, while && stops evaluation when a false operand is found. Their precedence is higher than comparison operators but lower than assignment operators.

The difference between || and && in C language

In C language, && and || are logical Operator used to combine two or more Boolean expressions.

|| (Logical OR)

|| The operator checks whether at least one of its operands is true:

• If any If one operand is true, the result is true.
• The result is false only if all operands are false.

&(logical AND)

&& operator checks whether its operands are both true:

• If all operations If the numbers are all true, the result is true.
• The result is false only if either operand is false.

Difference

|| and && is their behavior with the False operand:

• | | Even if one operand is true, subsequent operands are ignored.
• && The result is evaluated only if all operands are true.

Example

int a = 1, b = 0, c = 1;

printf("a || b || c: %d\n", a || b || c); // 输出：1
printf("a & b & c: %d\n", a & b & c); // 输出：0

In the first example, because a is true, the || operator ignores the values ​​of b and c.

In the second example, because b is false, the && operator stops evaluating and returns False even though c is true.

Priority

|| and && have higher precedence than comparison operators (==, !=, >, <, >=, < ;=), but lower than the assignment operator (=).

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