The meaning of && and || in c language

The logical operators && and || in C language are used for Boolean value operations. && (logical AND) returns true if both operands are true, otherwise returns false; || (logical OR) returns true if either operand is true, only if both operands are false Returns false. The order of operations is logical operators, relational operators, and arithmetic operators.

&& and || operators in C language

In C language, && and || are Logical operators used to perform logical operations on Boolean values ​​(true or false).

&& (logical "AND")

• Returns true when both operands are true.
• When any operand is false, return false.

|| (logical "OR")

• Returns true when any operand is true.
• Returns false only if both operands are false.

Order of operations

• The order of operations of logical operators is higher than that of relational operators and arithmetic operators.
• If the expression contains both logical operators and relational operators/arithmetic operators, the logical operators will be executed first.

Example

int x = 1;
int y = 0;

// 逻辑与
if (x > 0 && y < 0) {
    printf("x 是正数，y 是负数\n");
} else {
    printf("条件不满足\n");
}

// 逻辑或
if (x < 0 || y > 0) {
    printf("x 是负数，或 y 是正数\n");
} else {
    printf("条件不满足\n");
}

Output:

x 是正数，y 是负数
x 是负数，或 y 是正数

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