In C programming, how do you check for equality within a condition?

To check for equality within a condition in C programming, two equal signs (==) are used. This operator is specifically designed to compare two values for equality. When you use this operator, C evaluates whether the values on either side of the operator are the same; if they are, the expression returns true, and if they are not, it returns false.

Using a single equal sign (=) is incorrect because it is an assignment operator, which means it assigns the value on the right to the variable on the left rather than comparing two values. This can lead to unintended effects if used in a conditional statement.

An exclamation mark (!) is used in C for logical negation; it essentially means "not." It is not used to check equality but can negate the truth value of a statement.

Three equal signs (===) is a syntax used in languages like JavaScript for strict equality, which not only checks if the values are the same but also checks their data types. However, in C programming, this operator does not exist.

Therefore, using two equal signs (==) is the correct and appropriate way to check for equality in conditions while coding in C.