What is ?: in c language?

In C language, ?: is a conditional operator, also known as the ternary operator, which can select between two values ​​based on a conditional Boolean expression. The syntax is: condition ? value_if_true : value_if_false. If condition is true, returns value_if_true, otherwise returns value_if_false.

#What is ?: in C language?

In C language, ?: is a conditional operator, also known as the ternary operator. It allows developers to choose between two different values ​​based on a conditional Boolean expression.

Syntax

?: The syntax of the operator is as follows:

<code class="c">condition ? value_if_true : value_if_false;</code>

where:

• condition: Conditional Boolean expression. If true, select value_if_true.
• value_if_true: The first value to select if condition is true.
• value_if_false: The second value to select if condition is false.

How it works

?: The operator is based on the true or false value of the condition Boolean expression, in value_if_true## Choose between # and value_if_false.

If
• condition is true, the operator returns value_if_true.
If
• condition is false, the operator returns value_if_false.

Example

<code class="c">int age = 18;
char *message = (age >= 18) ? "成年人" : "未成年人";</code>

age Whether it is greater than or equal to 18, choose between the string "Adult" and "Minor". Since age is greater than or equal to 18, message will be assigned the value "Adult".

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