What is the use of if else if statement?

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. Use switch to specify many alternative blocks of code to be executed.

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Simply so, what does this if else if statement do?

The if/else statement extends the if statement by specifying an action if the if (true/false expression) is false. With the if statement, a program will execute the true code block or do nothing.

Subsequently, question is, what is an if statement give two examples? An if statement is a programming conditional statement that, if proved true, performs a function or displays information. Below is a general example of an if statement, not specific to any particular programming language. if (X < 10) { print "Hello John"; }

Likewise, people ask, what is the use of switch statement?

In computer programming languages, a switch statement is a type of selection control mechanism used to allow the value of a variable or expression to change the control flow of program execution via search and map.

What is the difference between if and if else statement?

Difference between if & if else statement is The if statement doesn't have else part means in if statement it will only specify that it is true or false. But in if else statement if the statement is false then it is specified in else part.

Related Question Answers

Why use else if instead of if?

4 Answers. The main reason to use else if is to avoid excessive indentation. Of course both of the pieces of code above are equivalent (which means it's impossible for the latter to be mandatory other than in style guides).

How many else if can you have?

There isn't a limit to the number of if statements. The issue is that one of the previous if statements catches the case you're testing. Go through each if statements for the case your testing and see if it's beging caught by a previous one. This happens because your else if(txtVal.

How do you write an if statement with multiple conditions?

Use either “&&” or “||” i.e. logical AND or logical OR operator to connect two or more conditions inside a if statement. For eg; If you want to find the number which is divisible by both 5 and 7 , you need to use logical AND, which returns true only if both the conditions are true….

Can you have multiple conditions in an if statement?

You can have two conditions if you use the double bars( || ). They mean "Or". That means only ONE of your conditions has to be true for the loop to execute. If you want all of conditions to be true use && .

Is else necessary after ELSE IF?

Yes, it is valid. The else is an optional part. During the program execution, the statements written inside the if block will only be executed when the condition mentioned is true. Otherwise, if the condition is false, the next consecutive lines after the if block will be executed.

How many else can you have in C?

No, there can be only one else per if . Since an else if is a new if , it can have a new else - you can have as many else if s as you want.

How do you do multiple if statements in C++?

A nested if in C is an if statement that is the target of another if statement. Nested if statements means an if statement inside another if statement. Yes, both C and C++ allows us to nested if statements within if statements, i.e, we can place an if statement inside another if statement.

How do you write an IF THEN statement in JavaScript?

In JavaScript we have the following conditional statements:

1. Use if to specify a block of code to be executed, if a specified condition is true.
2. Use else to specify a block of code to be executed, if the same condition is false.
3. Use else if to specify a new condition to test, if the first condition is false.

What is switch statement example?

A switch statement tests the value of a variable and compares it with multiple cases. Once the case match is found, a block of statements associated with that particular case is executed. Each case in a block of a switch has a different name/number which is referred to as an identifier.

Why switch case is better than if?

A switch statement is usually more efficient than a set of nested ifs. The compiler can do this because it knows that the case constants are all the same type and simply must be compared for equality with the switch expression, while in case of if expressions, the compiler has no such knowledge.

What are the limitations of if and switch statements?

Disadvantages of switch statements

• float constant cannot be used in the switch as well as in the case.
• You can not use the variable expression in case.
• You cannot use the same constant in two different cases.
• We cannot use the relational expression in case.

How do you use a case statement?

The case statement in SQL returns a value on a specified condition. We can use a Case statement in select queries along with Where, Order By and Group By clause. It can be used in Insert statement as well.

What happens if we don't use break in switch case?

Switch case statements are used to execute only specific case statements based on the switch expression. If we do not use break statement at the end of each case, program will execute all consecutive case statements until it finds next break statement or till the end of switch case block.

What is the effect of absence of break in a switch statement?

1 Answer. The break keyword causes the entire switch statement to exit, and the control is passed to statement following the switch.. case construct. Without break, the control passes to the statements for the next case.

What are the different types of IF statement?

There are three forms of IF statements: IF-THEN , IF-THEN-ELSE , and IF-THEN-ELSIF . The simplest form of IF statement associates a Boolean expression with a sequence of statements enclosed by the keywords THEN and END IF . The sequence of statements is executed only if the expression returns TRUE .

How does if statement work?

How if statement works? The if statement evaluates the test expression inside the parenthesis () . If the test expression is evaluated to true, statements inside the body of if are executed. If the test expression is evaluated to false, statements inside the body of if are not executed.

What is IF THEN statement in basic language?

The IF THEN ELSEIFELSE control statement allows identifying if a certain condition is true, and executes a block of code if it is the case. IF number<0 THEN PRINT "Number is negative" ELSEIF number>0 THEN PRINT "Number is positive" ELSE PRINT "Number is zero" END IF.

Is there else if in C?

Else If Statement in C. The Else If Statement in C is instrumental while we have to test several conditions. If the condition result is TRUE, then the statements present in that block will run. If the result is FALSE, Javac verifies the Next one (Else If condition) and so on.

What is the Do While loop syntax?

Syntax. do { statement(s); } while( condition ); Notice that the conditional expression appears at the end of the loop, so the statement(s) in the loop executes once before the condition is tested. If the condition is true, the flow of control jumps back up to do, and the statement(s) in the loop executes again.