What does a question mark in C++ mean?
conditional operator
The question mark is the conditional operator. The code means that if f==r then 1 is returned, otherwise, return 0. The code could be rewritten as int qempty() { if(f==r) return 1; else return 0; }
How do you use a question mark in CPP?
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 does question mark mean in code?
“Question mark” or “conditional” operator in JavaScript is a ternary operator that has three operands. The expression consists of three operands: the condition, value if true and value if false. The evaluation of the condition should result in either true/false or a boolean value.
What does || mean in C++?
Logical OR operator
Logical OR operator: || The logical OR operator ( || ) returns the boolean value true if either or both operands is true and returns false otherwise. The operands are implicitly converted to type bool before evaluation, and the result is of type bool .
What does question mark symbolize in C?
It is the “conditional operator”. It just happens to be a ternary operator, of which there is only one in C and C++.
What is a double question mark?
If double question marks are uses it is to emphasise something in return, usually from the shock of the previous thing said. For example, if I said: ‘My dog just died’ (sad, but used for example…) Someone may reply.
How do you write an if-else with a question mark?
The ternary operator, also known as the conditional operator, is used as shorthand for an if…else statement. A ternary operator is written with the syntax of a question mark (? ) followed by a colon ( : ), as demonstrated below.
How do you write a conditional in C++?
C++ has the following conditional statements: Use if to specify a block of code to be executed, if a specified condition is true….C++ Conditions and If Statements
- Less than: a < b.
- Less than or equal to: a <= b.
- Greater than: a > b.
- Greater than or equal to: a >= b.
- Equal to a == b.
- Not Equal to: a != b.
What does a question mark after a variable mean?
If you are new to JavaScript, the question mark after a variable may be confusing to you. Let’s shed some light into it. The question mark in JavaScript is commonly used as conditional operator — called ternary operator when used with a colon (:) and a question mark (?) — to assign a variable name conditionally.
What does ‘%’ mean in C?
Originally Answered: What does ‘%’ mean in C programming? % is an arithmetic operator in C that returns the remainder when the left operand is divided by the right operand. For example, 45%5 30%7.
What does %= mean in C?
%= Modulus AND assignment operator. It takes modulus using two operands and assigns the result to the left operand. C %= A is equivalent to C = C % A.
What does (?) Mean?
(?) is simply a passing note of incertitude at the preceding word (sometimes phrase). I am the tallest(?) in our class. Here this usage indicates that the author is not sure if he/she is really the tallest one.
Where is double question mark are used?
The double question mark is also used in cases when we want to highlight something while asking. Example: “Is that your cupboard or a pile of garbage??” “Didn’t you hear me when I said let’s go??” and “Who steals a pen??” Note:The sentences we end with a question mark (?) are also called interrogative sentences.
What does 3 question marks mean?
Reply. It’s supposed to indicate how much the person’s voice raises at the end of the sentence. If there’s 3 question marks, there voice gets really high at the end.
How do you use if-else condition?
Use if to specify a block of code to be executed, if a specified condition is true. Use else to specify a block of code to be executed, if the same condition is false. Use else if to specify a new condition to test, if the first condition is false.
How do you write if condition inside if condition?
if (condition1) { //These statements would execute if the condition1 is true } else if(condition2) { //These statements would execute if the condition2 is true } else if (condition3) { //These statements would execute if the condition3 is true } . . else { //These statements would execute if all the conditions return …
What is the format of conditional operator?
The conditional (ternary) operator is the only JavaScript operator that takes three operands: a condition followed by a question mark (? ), then an expression to execute if the condition is truthy followed by a colon ( : ), and finally the expression to execute if the condition is falsy.
What is conditional operator with example?
An Example of Conditional Operators The conditional operator “&&” first evaluates whether its first operand (i.e., number % 2 == 0) is true and then evaluates whether its second operand (i.e., number % 4 == 0) is true. As both are true, the logical AND condition is true.