Code360 powered by Coding Ninjas X Naukri.com. Code360 powered by Coding Ninjas X Naukri.com
Table of contents
1.
Introduction
2.
What is If-Else?
2.1.
Features of If-Else
2.2.
Syntax of If-Else Statement
2.3.
Example of If-Else Statement
3.
Advantages of using If Else
4.
Disadvantages of using If Else
5.
What is a Switch Case?
5.1.
Features of Switch Case
5.2.
Syntax of Switch Statement
5.3.
Example of Switch Statement
6.
Benefits of using a switch statement
7.
Limitations of using switch statement
8.
Difference Between If Else and Switch Statement
9.
The Main Difference Between If-Else and Switch
10.
Similarities Between If-Else And Switch Case Statement
11.
Frequently Asked Questions
11.1.
Which is faster if-else or switch?
11.2.
Can we replace switch with if-else?
11.3.
When should you use a switch case?
11.4.
Briefly mention the limitations of switch cases.
12.
Conclusion 
Last Updated: May 6, 2024
Easy

Difference between if else and Switch

Author Gaurav Gandhi
0 upvote
Master Python: Predicting weather forecasts
Speaker
Ashwin Goyal
Product Manager @

Introduction

The if-else statement evaluates various data types, including integers, characters, pointers, floating-point numbers, and booleans, while the switch statement assesses only character or numeric data types.

This blog will discuss if else and switch case statements in detail. Further, we will list the difference between if else and switch, understanding which would be better for decision-making.

 difference between if-else and switch

Also, read about Decision making in Java using if else and switch statements.

What is If-Else?

In the world of coding, an if else statement is an important part of any programming language used in decision-making. It executes a set of statements if a specific condition returns a true value else the control jumps to execute the statements of the else block if the condition returns a false value.

If else statement in Decision making

Features of If-Else

  • Conditional Execution: If-else statements allow for conditional execution of code blocks based on specified conditions.
  • Decision Making: They facilitate decision-making by executing different code blocks depending on whether a condition evaluates to true or false.
  • Single or Compound Condition: It can handle both single conditions (if) and compound conditions (else if) to evaluate multiple scenarios.
  • Fallback: The else block provides a fallback option for cases where none of the preceding conditions are met.
  • Nested If-Else: If-else statements can be nested within each other to handle complex decision trees.
  • Default Behavior: If-else allows defining a default behavior when no conditions are met, enhancing code robustness and reliability.
  • Limited Control Flow: While powerful, if-else statements provide linear control flow, and extensive nesting can make code harder to read and maintain.

Syntax of If-Else Statement

if( some conditional statement){
	// set of code to be executed if the condition is true
}
else{
	// set of code to be executed if the condition is false
}

Example of If-Else Statement

if(age>22){
	cout<<” Eligible to work”;
}
else{
	cout<<” NOT Eligible to work”;
}
Get the tech career you deserve, faster!
Connect with our expert counsellors to understand how to hack your way to success
User rating 4.7/5
1:1 doubt support
95% placement record
Akash Pal
Senior Software Engineer
326% Hike After Job Bootcamp
Himanshu Gusain
Programmer Analyst
32 LPA After Job Bootcamp
After Job
Bootcamp

Advantages of using If Else

There are several advantages of if else statements.

  • If else statements can be used to check for multiple complex conditions formed using a combination of logical operators, thus offering more flexibility.
     
  • The if else decision-making statement can compare values of all data types.
     
  • Unlike switch statements, if else statements are more portable with different platforms. The syntax and functionality of if else statements are the same for different programming languages.
     
  • If else statements are more readable than switch statements.

Disadvantages of using If Else

Some disadvantages of if else statements are:

  • In some cases, if else statements are not as efficient as switch cases.
     
  • Multiple if statements decrease the readability of the code.
     
  • The lack of a built-in fall-through mechanism in the if else statement results in duplicated code which makes the code difficult to manage.

What is a Switch Case?

Switch statements are used to run different sets of code based on the value of a single expression. If none of the cases match, the default set of code is executed.

Switch statement in Decision making

Features of Switch Case

  • Multi-Branch Decision: Switch-case statements provide a concise way to handle multi-branch decision-making based on the value of an expression.
  • Cleaner Syntax: Switch-case offers cleaner syntax compared to multiple nested if-else statements, improving code readability and maintainability.
  • Efficiency: It can be more efficient than if-else chains for certain scenarios, especially when dealing with a large number of conditions.
  • Value Matching: The expression inside switch is evaluated once, and then control jumps directly to the matching case, enhancing performance in some cases.
  • Falling Through: Unlike if-else, switch-case allows falling through multiple cases if there is no break statement, enabling executing multiple cases sequentially.
  • Default Case: Switch-case includes a default case to handle situations where none of the specified cases match the expression value, ensuring a fallback option.
  • Limited Expressions: Switch-case expressions are limited to integral types (like int and char) in C/C++, and restricted to certain types in other languages, limiting its applicability in some scenarios.

Syntax of Switch Statement

switch(expression){
	case value_1:
		// set of code to be executed if the expression equals value_1
	break;
	case value_2:
		// set of code to be executed if the expression equals value_2
	break;
	case value_3:
		// set of code to be executed if the expression equals value_3
	break;
	default:
		// set of code to be executed if none of the values match with the expression
}

Example of Switch Statement

switch(vowel){
	case ‘a’:
	Case ‘e’:
	case ‘i’:
	case ‘o’:
	case ‘u’:
		cout<<”vowels”;
	break;
	default:
		cout<<”consonants”;
}

 Fibonacci Series in C++
 

Benefits of using a switch statement

Switch statements in programming languages provide many benefits, including:

  • Switch statements reduce the complexity of the code, thereby increasing its readability.
     
  • Switch statements increase code maintenance. It is easier to update the code and make changes to it.
     
  • The switch statements execute faster than if else statements.
     
  • Switch case statements are more advantageous when there are more conditions.

Limitations of using switch statement

The Limitations of switch statements are:

  • Switch case can compare only integer and character values. Conditions involving complex data types like string, float, and double cannot be evaluated using switch statements, resulting in limited flexibility of switch statements.
     
  • Switch case statements can be used to check for only equality conditions. They do not support complex conditions like greater than, less than, etc.
     
  • Switch statements often result in code duplication.
     
  • The testing value used inside the switch expression must be known to compile a code containing switch statements.
     

Next, we will be discussing the difference between if else and switch statements.

Difference Between If Else and Switch Statement

If else statements and switch statements are used in conditional programming but differ in many aspects. The difference between if-else and switch statements are:

if else

switch

The if else statement is used to decide between two options.The switch statement is used to decide among multiple options.
if else statements follow a linear search approach to check conditionsswitch statements follow a binary search approach to check conditions.
if else statements can compare values of all data types, including integer, float, string, character, etc.Switch statements can only compare integer and character values.
In the if else statement, each condition is evaluated independently as they do not have a built-in fall through the property.Switch statements have a built-in fall-through functionality. If a break statement is absent in a case block, the control directly jumps to the next condition, even if the condition does not return a true value. 
If else can be used to check for complex conditions formed using the combination of relational operators.Switch statements can only be used to check for equality conditions.
We can use multiple conditions with one if else statement using logical operators.In switch, a single case can check for only a single expression.
The provided conditions determine the values of an if else statement.In a switch, the values depend on the preference of the user.
If a condition results in a false value, the statements of the else block are executed.If none of the cases match, the statements of the default block are executed.
if else statements are difficult to updateswitch statements are easier to update
It becomes slow when there are several conditions to be checked.It is faster than if else statements.

The Main Difference Between If-Else and Switch

The main difference between if-else and switch statements lies in their usage and syntax. If-else statements are used for conditional execution based on boolean expressions, while switch statements are used for multi-branch decision-making based on the value of a single expression.

Similarities Between If-Else And Switch Case Statement

Both if-else and switch-case statements are used for decision-making in programming. They allow the execution of different code blocks based on specified conditions or expression values. Additionally, both constructs enhance code readability and maintainability by organizing logic into clear decision branches. However, they differ in their syntax and the scenarios in which they are best suited.

Frequently Asked Questions

Which is faster if-else or switch?

In most cases, a switch statement is faster than a series of if-else statements because it's optimized for handling multiple conditions efficiently. However, whether you can replace a switch with if-else depends on the specific use case and readability of the code.

Can we replace switch with if-else?

Yes, you can replace a switch statement with if-else statements in most cases. However, the choice depends on code readability, complexity, and specific requirements of the problem you are solving.

When should you use a switch case?

The switch statement is used when we have to execute multiple sets of statements depending on the value of a variable. It is used to check for equality conditions and reduce code complexity.

Briefly mention the limitations of switch cases.

There are multiple limitations to using switch statements. Switch case can compare only integer and character values. At the same time, the switch does not support other data types. Also, Switch case statements can be used to check for only equality conditions.

Conclusion 

Kudos, Ninja, on making it to the finish line of this article! BJTs and Mosfets are two different transistors used for amplification in electronic circuits. Although they are both used for decision-making, the difference between if else and switch cases cannot be ignored.

We hope this blog was useful to you in understanding the key difference between if else and switch. Keep learning! We recommend you read some of our other Unix articles: 

1. Ternary operator

2. Loops

3. Nested if else in java
 

Refer to our Guided Path to upskill yourself in DSACompetitive ProgrammingJavaScriptSystem Design, and many more! If you want to test your competency in coding, you may check out the mock test series and participate in the contests hosted on Coding Ninjas Studio!

But suppose you have just started your learning process and are looking for questions from tech giants like Amazon, Microsoft, Uber, etc. You must look at the problemsinterview experiences, and interview bundles for placement preparations.
 

Happy Learning!

Previous article
Conditional Statements
Next article
Iteration Statements in C++
Live masterclass