JavaScript: Check whether a string "Script" presents at 5th (index 4) position in a given string

JavaScript Basic: Exercise-30 with Solution

Write a JavaScript program to check whether a string "Script" appears at the 5th (index 4) position in a given string. If "Script" appears in the string, return the string without "Script" otherwise return the original one.

Visual Presentation:

Sample Solution:

JavaScript Code:

// Define a function named check_script that takes a string parameter str
function check_script(str) {
  // Check if the length of the string is less than 6
  if (str.length < 6) {
    // If true, return the original string as it is
    return str;
  }

  // Initialize a variable result_str with the value of the input string
  let result_str = str;

  // Check if the substring from index 10 to index 4 (exclusive) is equal to 'Script'
  if (str.substring(10, 4) == 'Script') {
    // If true, update result_str to exclude the substring 'Script' from index 4 to the end
    result_str = str.substring(0, 4) + str.substring(10, str.length);
  }

  // Return the final result_str
  return result_str;
}

// Log the result of calling check_script with the argument "JavaScript" to the console
console.log(check_script("JavaScript"));

// Log the result of calling check_script with the argument "CoffeeScript" to the console
console.log(check_script("CoffeeScript")); 

Output:

Java
CoffeeScript

Live Demo:

See the Pen JavaScript: check if a string Script presents at 5th position - ex-30 by w3resource (@w3resource) on CodePen.

Flowchart:

ES6 Version:

// Define a function named check_script that takes a string parameter str
const check_script = (str) => {
  // Check if the length of the string is less than 6
  if (str.length < 6) {
    // If true, return the original string as it is
    return str;
  }

  // Initialize a variable result_str with the value of the input string
  let result_str = str;

  // Check if the substring from index 10 to index 4 (exclusive) is equal to 'Script'
  if (str.substring(10, 4) == 'Script') {
    // If true, update result_str to exclude the substring 'Script' from index 4 to the end
    result_str = str.substring(0, 4) + str.substring(10, str.length);
  }

  // Return the final result_str
  return result_str;
};

// Log the result of calling check_script with the argument "JavaScript" to the console
console.log(check_script("JavaScript"));

// Log the result of calling check_script with the argument "CoffeeScript" to the console
console.log(check_script("CoffeeScript"));

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