What is the difference between if and else if

If you have used if and else if combination only one will be executed where first comes the true value. For the first case: once an else if or the first if succeeds, none of the remaining else ifs or elses will be tested. However in the second case every if will be tested even if all of them or one of them succeeds. The first example won't necessarily run 3 tests where the 2nd example will given no returns or gotos. So you can infer that, if you are testing for the same variable - which can't have multiple values at a given time, the better option is to use the first approach as it will be optimum.

See, if you want check all the condition like one, two, three Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow.

Learn more. Difference Between If and Else If? Ask Question. Asked 7 years, 11 months ago. If the expression is false, the control is passed to the else block and the statements of the else block execute. At the end of the else block, the control is passed to the next statement after the else block. If the expression in the if statement is true, then the statement inside the if block will execute. Else the statement of the else block executes.

The number is less than Therefore, the else block executes. There is various decision-making structure in programming. This article discussed two of them: if and if else. In if, the statements inside the if block will execute if the condition is true and the control is passed to the next statement after the if block. In the if else, if the condition is true, the statements inside the if block execute and if the condition is false the statements in the else block execute.

That is the difference between if and if else. Point, Tutorials. Available here 2. There's no " else if ". You have the following: if condition statement or block Or: if condition statement or block else statement or block In the first case, the statement or block is executed if the condition is true different than 0.

You might have problems if you try to do this: if condition if condition statement or block else statement or block The problem here being you want the " else " to refer to the first " if ", but you are actually referring to the second one. Daniel C. Sobral Daniel C. Sobral k 82 82 gold badges silver badges bronze badges. There's an if statement comprised of a statement when true and [optionally] a statement when false. The developer can take advantage of the statement when false to check a new condition, and since this is an ubiquitous case it's become known as simply the "else if".

Jonathan Leffler k gold badges silver badges bronze badges. JStriedl JStriedl 1, 6 6 silver badges 10 10 bronze badges. Alex Baranosky Alex Baranosky They mean exactly what they mean in English. Clifford Clifford AShelly AShelly Michael Krelin - hacker Michael Krelin - hacker k 22 22 gold badges silver badges bronze badges. Obviously this can be repeated with another if statement as the first statement of code block 3. The else if statement is simply a reformatted version of this code.

David Harris David Harris 2, 1 1 gold badge 13 13 silver badges 25 25 bronze badges. Jeff Pinkston Jeff Pinkston 11 11 bronze badges. If and else if both are used to test the conditions.

I take case of If and else.. But both have their importance according to situation i take example of foor ordering menu if i use else if then it will suit well because user can check only one also. Garf 3, 5 5 gold badges 28 28 silver badges 39 39 bronze badges. What the if says: Whether I'm true or not, always check other conditions too. If the value is matched with any case, then its corresponding statements will be executed. Each case has some name or number known as the identifier.

The value entered by the user will be compared with all the cases until the case is found. If the value entered by the user is not matched with any case, then the default statement will be executed.

Both the if-else and switch are the decision-making statements. Here, decision-making statements mean that the output of the expression will decide which statements are to be executed. Based on the result of the expression in the 'if-else' statement, the block of statements will be executed.

If the condition is true, then the 'if' block will be executed otherwise 'else' block will execute. The switch statement contains multiple cases or choices. The user will decide the case, which is to execute. It can contain a single expression or multiple expressions for multiple choices. In this, an expression is evaluated based on the range of values or conditions. It checks both equality and logical expressions.

It contains only a single expression, and this expression is either a single integer object or a string object. It checks only equality expression.

An if-else statement can evaluate almost all the types of data such as integer, floating-point, character, pointer, or Boolean. In the case of 'if-else' statement, either the 'if' block or the 'else' block will be executed based on the condition. In the case of the 'switch' statement, one case after another will be executed until the break keyword is not found, or the default statement is executed.

If the condition is not true within the 'if' statement, then by default, the else block statements will be executed. If the expression specified within the switch statement is not matched with any of the cases, then the default statement, if defined, will be executed.

Values are based on the condition specified inside the 'if' statement. The value will decide either the 'if' or 'else' block is to be executed. In this case, value is decided by the user. Based on the choice of the user, the case will be executed.