Switch can be used instead of if else. It’s almost like if else too.
switch(expression) {
case x:
code block
break;
case y:
code block
break;
default:
code block
}
First we need to write the switch then expression, this is mean on which variable you are trying to apply.
Cases are the specific if. Like case “todoroki” will be same of variable===”todoroki”
Let’s try the last code in switch.
First we need the variable name. Then we’ll write the switch for the name – switch(name) {} everything will go inside the second brackets.
Finally –
This is almost same right ? So which one we should use ?
"As it turns out, the switch statement is faster in most cases when compared to if-else, but significantly faster only when the number of conditions is large. The primary difference in performance between the two is that the incremental cost of an additional condition is larger for if-else than it is for switch. Therefore, our natural inclination to use if-else for a small number of conditions and a switch statement for a larger number of conditions is exactly the right advice when considering performance.
Generally speaking, if-else is best used when there are two discrete values or a few different ranges of values for which to test. When there are more than two discrete values for which to test, the switch statement is the most optimal choice." - [oreilly.com]
So which one you are goint to use ?
You can see the graphical version here
Source Codes - { Check commits }
nerdjfpb
/
javaScript-Series
A tutorial for JavaScript Beginners
javaScript-Series
A tutorial for Absolute Beginners of JavaScript.
You can find the total pdf in - Here
You can check the commits to find the part by part codes.
Blogs
Day 1
- Day 1 - What is JavaScript?
Day 2
- Day 2 - JavaScript Types?
Day 3
- Day 3 - Javascript Types Cont.
Day 4
- Day 4 - Javascript Types Cont.
Day 5
- Day 5 - Javascript Comparisons
Day 6
- Day 6 - Javascript Variables
Day 7
- Day 7 - More About Variables
Day 8
- Day 8 - Conditional Statement
Day 9
- Day 9 - More Conditional Statement
Day 10
- Day 10 - Switch
Day 11
- Day 11 - Setup Code Editor
Day 12
- Day 12 - Loops
Day 13
- Day 13 - While Loop
Day 14
- Day 14 - For Loop
Day 15
- Day 15 - For Vs While
Day 16
- Day 16 - Functions
Day 17
Originally it published on nerdjfpbblog. You can connect with me in twitter or linkedin!
Top comments (0)