What is the difference between if-else and switch case?
If-else and switch case is selection statements that are quite popular in a computer programming language. These statements tend to confuse a lot of people learning different programming languages.
The main difference between if-else and switch case is that the if-else in C programming is a conditional statement that executes a different set of statements based on the condition that is true or false whereas the switch case is a conditional statement used in C programming to check the value of a variable and compare it with all the cases.
The lesson provides the core difference between If-else and switches case selection statement both in tabular and point form. Let’s find out:
What Is the If-else?
If-else is a programing language that provides a conditional statement that runs different sets of statements based on the “true and false” expressions.
The expression evaluated can be “true” for any non-zero values and “false” for zero values. The else statement can either be a single statement or a block statements.
The expression in if statement tends to contain integers, pointers, character and floating-point. The else statement is normally optional in an if-else statement.
Example of If-else Statement:
Main Features of If-else Statement
- If support statements for true part only
- If-else support statements for true and false
- If the test expression is true then a true block statement is executed otherwise
- Either the true block statement or false block statement is executed every time
What Is the Switch Case?
The switch case statement is a programming language that used to test the value of a variable as compared to its multiple causes.
In case the expression evaluates an integer or a constant then the evaluation can be based on equality. If the expression evaluates against a constant then a match needs to be found.
A break statement tends to be optional in a switch statement. But the absence of a break statement will result in a nonstop execution until the end of the switch statement.
Switch statement normally uses keyboard commands and the expression usually contain a single expression.
Example of Switch Case Statement
Main Features of the Switch Case
- Multiple-way decision
- Tend to test whether the expression matches any of the constant values
- The expression can be an integer or character expression
- Each case is labelled by either one or two integers
- There must be the value of all expressions
- If the case matches the value of the expression then execution starts
Comparison Chart: (If-else vs Switch Case)
|Basic Terms||If-else Statement||Switch Case Statement|
|Meaning||The statement will be executed depending on the expression value inside the if-else statement||The statement execution is determined by the user|
|Expression||Uses multiple statements for multiple decisions||Uses a single statement for multiple decisions|
|Testing||Test logical expressions and equality||Test only for equality|
|Evaluation||Evaluates integers, characters, floating points, pointers and boolean type.||Evaluates character expressions and integers|
|Sequence of Execution||Either else or if statement will be executed||Execute each case one after the other until a break statement appears.|
|Default Execution||If the condition inside the if-statement is false then by default the else statement is executed if created.||If the switch statement does not match any case then the default statement is executed if created.|
|Editing||Tend to be difficult to edit if-else statement when the nested if-else statement is used.||Easy to edit if-else statement and they can easily be recognized.|
|Values||Values are based on constraints||Values are based on user choice|
|Use||Use to evaluate conditions if true or false||Use multiple values for the same variable or expression.|
Main Difference between If-else and Switch Case
- If-else statement is used to select among two choices while the switch case statement is used to select among multiple choices.
- If-else values are based on constraints while switch case values are based on user choices.
- If-else statements are used to implement a linear search while switch case statement to implement binary search.
- Tend to be quite tough to edit if-else statement when the nested if-else statement is used while the switch case statement is simple to edit.
Similarities between If Else and Switch Case
- Both used in the control flow of programs
- Both are used in the evaluation of conditions
- Both tend to be identical except the way of representation
Programing language tends to be difficult for beginners and it is recommended to understand terms such as if-else and switch-case statements.
The difference between if-else and switch-case statements listed in the article are worth reading to improve your programming skills.
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