String Manipulation in JavaScript

Question 1

.length()

Answer 1

returns count of total number of characters

Question 2

.charAt()

Answer 2

returns a char at the given index number

Question 3

.includes()

Answer 3

returns True if the string includes a certain character/word, False if it doesnt

Question 4

.indexOf()

Answer 4

displays index of the first occurence of the element. if the element is not in a string, it will return -1

Question 5

.replace()

Answer 5

returns a string replacing all the old char or CharSequence to newchar or ChrSequence. The original string will remain unchanged

Question 6

.search()

Answer 6

seraches a string for a specified value, and returns the position of the match

Question 7

.slice()

Answer 7

str.slice(2,5)

will print out up to index 5 but not including it (“I love Javascript”//”lov”)

Question 8

.split()

Answer 8

splits a string into an array of substrings, and returns the new array. Delimeter can be a space or any character and JS will look for that inside the string and split:

		let str = "I love Javascript"
		let a = str.split(" ")
		console.log(a)// [ 'I', 'love', 'Javascript' ]

Question 9

.toUpperCase()

Answer 9

returns the calling string value converted to upper case

Question 10

.concat()

Answer 10

adds the strings

Question 11

.join()

Answer 11

transforms array to a string, it is opposite of split()

Question 12

.trim()

Answer 12

removes whitespaces from the both sides of the string