JS-Strings.

Total Number of Questions: 13
  Count Characters.

You are given a string S, and your task is to return an array B(having a size of 2), where B[0] contains the count of character A(uppercase) in string S and B[1] contains the count of character D(uppercase) in string S .

Note: Complete the countCharacters function. No need to take any input.

Ans:-
const countCharacters = (S) => {
    var B = [];
    var countA = 0, countD = 0;
    for(let i=0; i < S.length; i++){
        if(S[i] === "A"){
            countA++;
        }
        else if(S[i] === "D"){
            countD++
        }
    }
    B.push(countA);
    B.push(countD);
    return B;
};
  Count the Heads.

Tina is given a string S which contains the first letter of all the student names in her class. She got a curiosity to check how many people have their names starting from the same alphabet. So given a string S , she decided to write a code that finds out the count of characters that occur more than once in the string.

Note: Complete the Count_Occ function. No need to take any input.

Ans:-
var Count_Occ = (s) => {
    let Arr = s.split("").sort();
    var p;
    let map1 = new Map();
    for(let i =0; i<Arr.length;i++){
        p=0;
        Arr.reduce((acc,val)=>{
    	    if(val == Arr[i]){
                p=acc+1;
    	    }
    	    return p;
        }, 0);
        map1.set(`${Arr[i]}` , p);
    }
    let z = [];
    map1.forEach((value,key)=>{
        if(value>1){
    	    z.push(key + "" + value);
        }
    });
    return (z.join(""));
						  };
  Count the Vowels.

You are given a string S containing both uppercase and lowercase letters. You need to find out the number of vowels in the given string.

Note: Complete the Count_Vowels function. No need to take any input.
Ans:-
var Count_Vowels= (S) =>{
    var count = 0;
    for(let i=0; i < S.length; i++){
        if(S[i]==="A"||S[i]==="a"||S[i]==="E"||S[i]==="e"||S[i]==="I"
        ||S[i]==="i"||S[i]==="O"||S[i]==="o"||S[i]==="U"||S[i]=="u"){
            count++;
        }
    }
    return count;
};
  Concatenate the Strings.

You are given two strings S1 and S2 (containing both uppercase and lowercase letters), You need to retrun a string which is the concatenation of both the given strings.

Note: Complete the Concatenate_Strings function. No need to take any input.
Ans:-
var Concatenate_Strings = (S1, S2) => {
    S3 = S1+S2;
    return S3;
};
  Find Length.

You are given a string S, and your task is to return the length of the string S .

Note: You have to solve it without using length method. Complete the findLength function. No need to take any input.
Ans:-
const findLength = (S) => {
    var count = 0;
    for(i=0; i < S.length; i++){
        count++;
    }
    return count;
};
  Find the Winner.

You are given a string S consisting of two letters A and D, where each character represent the winner of N games played between Aditya and Danish, where letter A represents the win of Aditya and letter D represents the win of Danish. You need to find out the that which player wins the maximum number of games or there is a draw between them.

Note: Also, in the output array, the age should be in the same order as in the input array. Complete the Game_Winner function. No need to take any input.
Ans:-
var Game_Winner = (S) => {
    var Aditya = 0;
    var Danish = 0;
    for(let i=0; i < S.length; i++){
        if(S[i]==="A"){
            Aditya++;
        }
        else Danish++;
    }
    if(Aditya!==Danish){
        if(Aditya < Danish){
            return "Danish";
        }
        else return "Aditya";
    }
    else return "Draw";
};
  Join Strings.

You are given two strings S and P, and your task is to concatenate them and return the concatenated string.

Note: Complete the joinStrings function. No need to take any input.
Ans:-
const joinStrings = (S, P) => {
    let str=''
    str=S+P
    return str
};
  Plaindrome Check.

You are given a string S, Your task is to check wether the given string is a Palindromeor not. A Palindrome is a string, which turnout same when read in reverse direction.
Example: "naman" is a Palindrome. String can contain both upppercase lowercase letters.

Note: Complete the Palin_Check function. No need to take any input.
Ans:-
var Palin_Check = (str) => {
    var i = 0;
    j = str.length - 1;
    while (i < j) {
        if (str.charAt(i) !== str.charAt(j)){
            return "False";
        }
        i++;
        j--;
    }
    return "True";
};
  Reverse the String.

You are given a string S, Your task is to Reverse the string. String can contain both upppercase lowercase letters.

Note: You have to complete Reverse_String function. No need to take any input.
Ans:-
var Reverse_String = (str) => {
    arr = [];
    reverseStr = "";
    for(let i=str.length-1; i>=0; i--){
        reverseStr += str[i]
    }

    return reverseStr;
};
  Match the Strings.

You are given two strings S1 and S2, Your task is to print YES if both strings are same else print NO.

Note: Complete the String_Match function. No need to take any input.
Ans:-
var String_Match = (S1,S2) => {
    if(S1==S2){
        return 'YES';
    }
    else{
        return 'NO';
    } 
};
  String Replace.

You are given a string S, along with a pattern string and a text string. You need to repalce the pattern string in S to the text string.

Note: Complete the Replace function. No need to take any input.
Ans:-
var Replace = (S, pattern , text) => {
    return S.replace(pattern,text)
};
  Split the String.

You are given a string S, Your task is to split the string with respect to spaces.

Note: Complete the Split_the_string function. No need to take any input.
Ans:-
var Split_the_string = (S) => {
    word = ""
    arr = []
    for(let i=0;i < S.length;i++){
        if(S[i]!==" "){
            word += S[i]
        }
        else{
            arr.push(word);
            word = ""
        }
    }
    arr.push(word)
    return arr
};
  Count the Vowels and Consonants.

You are given a string S containing both uppercase and lowercase letters. You need to find out the number of vowels and the number of consonants in the given string.

Note: Complete the Split_the_string function. No need to take any input.
Ans:-
var Count_Vowels= (S) => {
    S=S.toUpperCase();
    let countV=0;
    for(i=0;i < S.length;i++){
        if(S[i]=='A' || S[i]=='E' || S[i]=='O' || S[i]=='I' || S[i]=='U'){
            countV+=1;
        }
    }
    return countV;
};
var Count_Consonants= (S) => {
    S=S.toUpperCase();
    let countV=0;
    let countC=0;
    for(i=0;i < S.length;i++){
        if(S[i]=='A' || S[i]=='E' || S[i]=='O' || S[i]=='I' || S[i]=='U'){
            countV+=1;
        }
        else{
            countC+=1;
        }
    }
    return countC;
};