What does the following code log?var str = "I love cats!";console.log(str.indexOf("cat"));A6B7C-1
Question
What does the following code log?var str = "I love cats!";console.log(str.indexOf("cat"));A6B7C-1
Solution
The code logs 7.
Here's the step by step explanation:
-
The
indexOf()method in JavaScript returns the position of the first occurrence of a specified value in a string. -
In the given code,
str.indexOf("cat")is used. This means it's looking for the position of the string "cat" in the variablestr, which is "I love cats!". -
The position of a string is counted from 0, not 1. So, the first character of the string
str("I") is at position 0, the second character (the space) is at position 1, and so on. -
The string "cat" starts at the 7th position in the string
str. Therefore,str.indexOf("cat")returns 7.
So, the correct answer is B7.
Similar Questions
What does the following code log?var str = "Twice a day";var index = str.indexOf("a");var index2 = str.lastIndexOf("a");console.log(str.indexOf("a", index + 1) === index2);AtrueBfalse
What is the output of this code?let str="Hello world ! This is a wonderful day.";console.log(s.lastIndexof('w'));
What would be logged to the console by the following block of code?let a = "ILoveProgramming"; let result = a.substring(3, 6);console.log(result);vePILogniing
What is the output of following code?var a = 10;function test() { a = 20;}test();console.log(a);Options: Pick one correct answer from below1020
Question 18What will be the output of the following code?123console.log(cat);var cat = 'Tabby cat'; 1 pointUncaught TypeError'Tabby cat'undefinednull19.Question 19
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.