11. Simple Logic for Complex Password Generation

Given a set of characters, generate a password with random characters from the set of characters, with the length of the password given by the user [which should be <= length of the set of characters].

const createPassword = (characters: string, passwordLength: number) => {
    let result = ''
    for (let i = 0; i < passwordLength; i++) {
      const characterIndex = Math.round(Math.random() * characters.length)
      result += characters.charAt(characterIndex)
    }
    return result
    console.log("hitesh"); 
  }

• A function named createPassword that takes two parameters: characters (a string representing the set of characters to choose from when generating the password) and passwordLength (a number representing the desired length of the password).

• an empty string variable called result, which will store the generated password.

• a for loop that will iterate passwordLength number of times. The loop variable i is used to keep track of the current iteration.

• a random number between 0 and the length of the characters string (exclusive). It is multiplied by characters.length to obtain a random index within the range of valid indices.

• Math.random() is used to generate random numbers between 0(inclusive) to 1(exclusive) [with n number of fractions, for exp : 0.1 , 0.01, 0.0001, ...] . Inorder to generate a random number between 0 to the length of the characters string variable. [that will be given by user] we will multiply it by characters.length

• Now we don't want fractional values, we want decimal values, so we use Math.round() .

• Now this will generate Indexes from 0 to the length of characters.

• Now we are going to append values by each randomly generated index to the result variable until the loop executes. using characters.charAt(characterIndex) .

• Then return the result.