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Maru [420]
2 years ago
5

What is ambiguous grammar, explain in maximum 50words.

Computers and Technology
1 answer:
saul85 [17]2 years ago
8 0

Answer:

 Ambiguous grammar is defined as in programming language, if the string terminal is generated in more than one way is known as ambiguous grammar. It is also known as context free grammar. The common example of ambiguous grammar - when the string has multiple rightmost or leftmost derivation and parse trees,  

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4.Write a JavaScript program to find if a given word is a palindrome or not. Word is given by user via prompt command.
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Answer:

Here is the JavaScript program:

function Palindrome(word) {

   return word == word.toLowerCase().split("").reverse().join("") ? true : false; }

inputWord = prompt("Enter a word to check its if its palindrome or not?");  

alert(Palindrome(inputWord));

Explanation:

The function Palindrome takes a word as argument.

 return word == word.toLowerCase().split("").reverse().join("") ? true : false; }

This statement first converts the word, which is a string to lower case letters using toLowerCase() method. Next split() method splits the word string into an array of strings, then reverse() method reverses the this array and join() method joins all the elements of the array back to the string. At last the conditional statement checks if the resultant string (reverse of word) is equal  to the original word (that was input by user). If both the word and its reverse are equal/same then the program outputs true otherwise returns false.

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