How to express subtraction in C language

In C language, the subtraction operator is the minus sign (-), which is used to subtract one operand from another operand. Its priority is lower than the assignment operator (=), but higher than the assignment operator. When operands of different types are subtracted, the smaller type will be promoted to the larger type for operation. If the result exceeds the data type range, overflow occurs. The subtraction operator can also be used to negate an operand.

How to express subtraction in C language

The subtraction operation is represented by the minus sign (-) symbol in C language . It is used to subtract one operand from another operand.

Syntax:

<结果> = <操作数1> - <操作数2>;

Example:

int a = 10;
int b = 5;
int result = a - b; // result 将等于 5

Priority:

The subtraction operator (-) has lower precedence than the assignment operator (=). So when processing an expression, the assignment operation will be performed first.

Type promotion:

If the two operands are of different types, the smaller type is promoted to the larger type. For example, if one operand is of type int and the other is of type float, the int type is promoted to type float for the subtraction operation.

Overflow:

If the result of the subtraction operation exceeds the range of the data type, overflow will occur. For example, if two int operands are subtracted and the result is greater than INT_MAX or less than INT_MIN, an overflow occurs.

Special Note:

• The subtraction operator can also be used for negation. In this case, it only acts on one operand.
• You can also use a minus sign before a negative number to indicate inversion. For example, -5 means -5.

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