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JavaScript: Concatenate two strings and return the result

JavaScript Basic: Exercise-64 with Solution

Write a JavaScript program to concatenate two strings and return the result. If the length of the strings are not same then remove the characters from the longer string.

For example "Python" and "JS" will be "onJS".

Pictorial Presentation:

JavaScript: Concatenate two strings and return the result

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to concatenate two strings and return the result. If the length of the strings are not same then remove the characters from the longer string.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function str_con_cat(str1, str2) {
  const m = Math.min(str1.length, str2.length);

  return str1.substring(str1.length - m) + str2.substring(str2.length - m);
}

console.log(str_con_cat("Python", "JS"));
console.log(str_con_cat("ab", "cdef"));

Sample Output:

onJS
abef

Flowchart:

Flowchart: JavaScript - Concatenate two strings and return the result

ES6 Version:

function str_con_cat(str1, str2) {
  const m = Math.min(str1.length, str2.length);

  return str1.substring(str1.length - m) + str2.substring(str2.length - m);
}

console.log(str_con_cat("Python", "JS"));
console.log(str_con_cat("ab", "cdef"));

Live Demo:

See the Pen JavaScript - Concatenate two strings and return the result - basic-ex-64 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript program to create a string using the middle three characters of a given string of odd length.
Next: Write a JavaScript program to test if a string end with "Script". The string length must be greater or equal to 6.

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JavaScript: Tips of the Day

Checks if a string is an anagram of another string (case-insensitive, ignores spaces, punctuation and special characters)

Example:

const isAnagram = (str1, str2) => {
  const normalize = str =>
    str
      .toLowerCase()
      .replace(/[^a-z0-9]/gi, '')
      .split('')
      .sort()
      .join('');
  return normalize(str1) === normalize(str2);
};
console.log(isAnagram('iceman', 'cinema')); // true

Output:

true