12 Difference Between If-else And Switch Case

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What Is A Switch Case Statement?

A switch case statement in programming is a statement that tests the value of a variable and compares it with multiple cases. In the process, when the case match has been found a block of statements associated with that given case is executed. Each case in a block of a switch has a different name/number which is known as an identifier. The value provided by the user is compared with all the cases inside the switch block until the appropriate match is found.  If the appropriate case match is found then the default statement is executed and the control goes out of the switch block.

Features of Switch Case

  • Switch case takes decision on the basis of equality.
  • Each case refers back to the original expression.
  • Each case has a break statement. The default may or may not use the break statement.
  • The data type that can be used in switch expression is integer type only.
  • The switch case statement analyses the value of an expression and a block code is selected on the basis of that evaluated expression.

What Is An If-else Statement?

An if-else statement in programming is a conditional statement that runs a different set of statement depending on whether an expression is true or false. The if-else statement executes a block of code if a specified condition is true. If the condition is false, another block of code can be executed.

The if-else statement is a part of JavaScript’s “Conditional” statements, which are used to perform different actions based on different conditions.

Features of if-else Statement

  • Multiple statements are used for multiple choices.
  • If statement evaluates integer, character, pointer or floating-point type or Boolean type.
  • Statement will be executed depending upon the output of the expression inside if statement.
  • Every time, either true block or false block will be executed.

Also Read: Difference Between Switch Case And Else If Ladder

Difference Between If-else And Switch Case Statement In Tabular Form

BASIS OF COMPARISON     IF-ELSE SWITCH CASE
Check the Testing Expression An if-else statement can test expression based on range of values or conditions.   A switch statement tests expressions based only on a single integer, enumerated value or string object.  
Ideal for If-else conditional branches are great for variable conditions that results into Boolean.   Switch statements are ideal for fixed data values.
Creation of Jump Table In if-else case we do not create a jump table and all cases are executed at runtime.   In switch case, we create jump table on compiled time only selected case is executed on runtime.
Type of Search If else implements linear search.     Switch implements binary switch.
Condition & Expression Having different conditions is not possible.  We can only have one expression.      
Evaluation   If-else statement evaluates integer, character, pointer or floating-point type or Boolean type. Switch statement evaluates only character or integer value.
Sequence of Execution   It is either if-statement will be executed or else-statement is executed.   Switch case statement executes one case after another till a break statement appears or until the end of switch statement is reached.  
Default Execution If the condition inside if statements is false then by default the else statement is executed if created. If the condition inside switch statements does not match with any of cases, for that instance, the default statement is executed if created.
Values   Values are based on constraint.     Values are based on user choice.      
Use It is used to evaluate a condition to be true or false.     It is used to test multiple values of the same variable or expression like 1, 2, 3 etc.
Editing It is difficult to edit the if-else statement, if the nested if-else statement is used.   It is easy to edit switch cases as they are recognized easily.

What Are Some Of The Similarities Between If-Else And Switch Case Statement?

  • If-else and switch case statement are both used to control the flow of program.
  • Both switch case and if-else statement is used for evaluating conditions.
  • Both switch case and if-else statement are identical, what is only different between them is the way of representation.

Also Read: Difference Between While And Do-While