Basic Programming Problem Set
Below are some fundamental programming problems along with solutions and explanations:
Description: Write a function that takes two numbers as input and returns their sum.
Solution:
function calculateSum(a, b) {
return a b;
}
Explanation: The function simply adds the two input numbers together and returns the result.
Description: Write a function that takes an array of numbers as input and returns the maximum number.
Solution:
function findMax(arr) {
let max = arr[0];
for (let i = 1; i < arr.length; i ) {
if (arr[i] > max) {
max = arr[i];
}
}
return max;
}
Explanation: The function iterates through the array, updating the maximum number found so far.
Description: Write a function that takes a number as input and returns true if it's prime, false otherwise.
Solution:
function isPrime(num) {
if (num <= 1) return false;
for (let i = 2; i <= Math.sqrt(num); i ) {
if (num % i === 0) {
return false;
}
}
return true;
}
Explanation: The function checks divisibility of the number up to its square root to determine if it's prime.
Description: Write a function that takes a string as input and returns the string reversed.
Solution:
function reverseString(str) {
return str.split('').reverse().join('');
}
Explanation: The function splits the string into an array of characters, reverses the array, and then joins it back into a string.
Description: Write a function that takes a string as input and returns true if it's a palindrome, false otherwise.
Solution:
function isPalindrome(str) {
const reversed = str.split('').reverse().join('');
return str === reversed;
}
Explanation: The function checks if the original string is equal to its reversed form.