Difference Between if-else and switch
if-else
“if” and “else” are the keywords, and the statements can be a single statement or a block of statements. The expression evaluates to be “true” for any non-zero value and for zero it evaluates to be “false”.The expression in if statement can contain an integer, character, pointer, floating-point or it can be a boolean type. The else statement is optional in an if-else statement. If the expression returns true, the statements inside if statement is executed, and if it returns false the statements inside else statement are executed and, in case an else statement is a not created no action is performed, and the control of the program jump out of an if-else statement.
if (condition) {
// Block of code if condition true
} else {
// Block of code is condition false
}
What is a switch statement?
In the switch statement, we compare the condition value with multiple cases. When there is a match with any one of the cases, the block of code corresponding with that case is executed. Each case has a name or a number which is known as its identifier. If none of the cases matches the condition, the block of code corresponding to the default case is executed.
Syntax of switch statement
switch (condition) {
case identifier1:
//block of code
break;
case identifier2:
//block of code
break;
case identifier3:
//block of code
break;
case identifiern:
//block of code
break;
default:
//block of code
}
Difference Between if-else and switch
|
Parameter |
If-else |
Switch |
|
Definition |
In the case of 'if-else' statement, either the 'if' block
or the 'else' block will be executed based on the condition. |
The switch statement has multiple cases and the code block
corresponding to that case is executed |
|
Evaluation |
Used for integer, character, pointer or floating-point type or
Boolean type |
Used for character expressions and integers. |
|
Tests |
Tests both logical expressions and equality |
Tests only equality |
|
Expression |
Multiple statements for multiple decisions |
Single statements for multiple decisions |
|
Sequence of Execution |
Either the code block in if statement is executed or the code block
in else statement. |
The switch case statement performs each case until a break statement
is encountered or the end of the switch statement is reached. |
|
Default Execution |
If the condition inside the if-statement is false, then the code
block under the else condition is executed |
If the condition inside switch statements does not match any of the
cases, the default statement is executed. |
|
Values |
Based on constraint |
Based on user |
|
Speed |
If you use 'if-else' to implement several options, the speed will be
slow. |
If we have numerous options, the switch statement is the best
solution because it executes considerably faster than the 'if-else'
statement. |
|
Editing |
Difficult to edit nested if-else statements. |
Easy to edit. |
