What is the use of exclamation mark in programming?

In programming and scripting languages, the exclamation mark is used as “not.” For example, “! =” also means not equal. See our operator definition for further information. Used to help identify a nonexecutable statement.

What does ‘?’ Mean in C?

Most likely the ‘?’ is the ternary operator. Its grammar is: RESULT = (COND)? ( STATEMEN IF TRUE) : (STATEMENT IF FALSE) It is a nice shorthand for the typical if-else statement: if (COND) { RESULT = (STATEMENT IF TRUE); } else { RESULT = (STATEMENT IF FALSE);

What does double exclamation mean in C?

Double exclamation or simply ‘!! ‘ turns the expression value into binary representation: either ‘1’ or ‘0’. Everything that could be treated as true results into ‘1’ otherwise – ‘0’.

What does the exclamation mark mean in C++?

It’s a C operator, simply meaning “not”. So ! YES == NO and !

What is the meaning of exclamation point?

Definition of exclamation point 1 : a mark ! used especially after an interjection or exclamation to indicate forceful utterance or strong feeling. 2 : a distinctive indication of major significance, interest, or contrast the game put an exclamation point on the season.

What is question mark used for in C?

The question mark operator,?:, is also found in C++. Some people call it the ternary operator because it is the only operator in C++ (and Java) that takes three operands. If you are not familiar with it, it’s works like an if-else, but combines operators.

What is negation operator in C?

The logical negation operator ( ! ) reverses the meaning of its operand. The operand is implicitly converted to type bool . The result is true if the converted operand is false ; the result is false if the converted operand is true .

Which loop is more efficient?

Repeat keeps iterating until a condition is false, whereas a while loop is the opposite. Pros: It turns out that Repeat is actually quite a bit more efficient than While, demonstrated below. Repeat may have the convenience that in many situations, the condition is not known or even defined until inside the loop.