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In this problem, we are given a number n. Our task is to create a program to find sum of series 1 + 1/2 + 1/3 + 1/4 + .. + 1/n in C++.Code description − Here, we will find the sum of the series 1 + 1/2 + 1/3 + 1/4 + .. + 1/n till nth term. The series is a harmonic progression series.Harmonic progression is a series whose inverse will be an arithmetic progression. I.e. if for a harmonic progression A1, A2, A3... An, there is an arithmetic progression 1/A1, 1/A2, 1/A3.First, let’s take an example to ... Read More
In this problem, we are given a value d, which is the common difference of AP. This AP is all the angles of a quadrilateral. Our task is to create a program to find the angles of a quadrilateral in C++.Problem Description − Here, the angles of the quadrilateral are in the form of an AP with common difference d. And we need to find the angles.Let’s take an example to understand the problemInputd = 15Output67.5, 82.5, 97.5, 112.5ExplanationFirst angle is x Second angle is x + 15 Third angle is x + 30 Four angle is x + 45Sum ... Read More
In this problem, we are given a value that denotes the radius of a semicircle. Our task is to create a program to find the Area and Perimeter of a Semicircle in C++.SemiCircle is a closed figure that is half of a circle.Let’s take an example to understand the problem, InputR = 5Outputarea = 39.25 perimeter = 15.7Solution ApproachTo solve the problem, we will use the mathematical formula for the area and perimeter of a semi-circle which is derived by dividing the area of circle by 2.Area of semicircle, A= $½(\prod^*a^2)=1.571^*a^2$Perimeter of semicircle, P =(π*a)Area of semicircle, area = $½(π^*a^2)$Program ... Read More
The primorial of a number n is equal to the product of first n prime numbers.For example, if n = 4Then, the output primorial(n) is, 2*3*5*7 = 210We are required to write a JavaScript function that takes in a number and returns its primordial.ExampleFollowing is the code −const num = 4; const isPrime = n => { if (n===1){ return false; }else if(n === 2){ return true; }else{ for(let x = 2; x < n; x++){ if(n % x === 0){ ... Read More
We are required to write a JavaScript function that takes in an array that contains elements of different data types and the function should return a map representing the frequency of each data type.Let’s say the following is our array −const arr = [23, 'df', undefined, null, 12, { name: 'Rajesh' }, [2, 4, 7], 'dfd', null, Symbol('*'), 8];ExampleFollowing is the code −const arr = [23, 'df', undefined, null, 12, { name: 'Rajesh'}, [2, 4, 7], 'dfd', null, Symbol('*'), 8]; const countDataTypes = arr => { return arr.reduce((acc, val) => { const dataType ... Read More
We are required to write a JavaScript function that takes in two arrays of numbers.And the function should return true if the two arrays upon combining and shuffling can form a consecutive sequence, false otherwise.For example − If the arrays are −const arr1 = [4, 6, 2, 9, 3]; const arr2 = [1, 5, 8, 7];Then the output should be true.ExampleFollowing is the code −const arr2 = [1, 5, 8, 7]; const canFormSequence = (arr1, arr2) => { const combined = [...arr1, ...arr2]; if(combined.length < 2){ return true; }; combined.sort((a, b) => a-b); ... Read More
We are required to write a JavaScript function that takes in a string sentence as first and the only argument. The function should return the length of the second smallest word from the string.For example: If the string is −const str = 'This is a sample string';Then the output should be 2.ExampleFollowing is the code −const str = 'This is a sample string'; const secondSmallest = str => { const strArr = str.split(' '); if(strArr.length < 2){ return false; } for(let i = 0; i < strArr.length; i++){ strArr[i] = ... Read More
Suppose we are given a number 124 and are required to write a function that takes this number as input and returns its expanded form as a string.The expanded form of 124 is −'100+20+4'ExampleFollowing is the code −const num = 125; const expandedForm = num => { const numStr = String(num); let res = ''; for(let i = 0; i < numStr.length; i++){ const placeValue = +(numStr[i]) * Math.pow(10, (numStr.length - 1 - i)); if(numStr.length - i > 1){ res += `${placeValue}+` }else{ res += placeValue; }; }; return res; }; console.log(expandedForm(num));OutputFollowing is the output in the console −100+20+5
We are required to write a JavaScript function that takes in a string as the first argument, a number, say n, as the second argument and a character, say c, as the third argument. The function should replace the nth appearance of any character with the character provided as the third argument and return the new string.ExampleFollowing is the code −const str = 'This is a sample string'; const num = 2; const char = '*'; const replaceNthAppearance = (str, num, char) => { const creds = str.split('').reduce((acc, val, ind, arr) => { let { res, ... Read More
We are required to write a JavaScript function that takes in an array of numbers and returns a subarray that contains all the element from the original array that are larger than all the elements on their right.ExampleFollowing is the code −const arr = [12, 45, 6, 4, 23, 23, 21, 1]; const largerThanRight = (arr = []) => { const creds = arr.reduceRight((acc, val) => { let { largest, res } = acc; if(val > largest){ res.push(val); largest = val; }; return { largest, res }; }, { largest: -Infinity, res: [] }); return creds.res; }; console.log(largerThanRight(arr));OutputFollowing is the output in the console −[ 1, 21, 23, 45 ]