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JavaScript: Check whether a given string contains equal number of p's and t's

JavaScript Basic: Exercise-55 with Solution

Write a JavaScript program to check whether a given string contains an equal number of p's and t's.

Pictorial Presentation:

JavaScript: Check whether a given string contains equal number of p's and t's

Sample Solution:

JavaScript Code:

// Define a function named equal_pt with parameter str
function equal_pt(str) { 
  // Replace all characters except 'p' with an empty string and store the result in str_p
  var str_p = str.replace(/[^p]/g, "");

  // Replace all characters except 't' with an empty string and store the result in str_t
  var str_t = str.replace(/[^t]/g, "");

  // Get the length of str_p and store it in p_num
  var p_num = str_p.length;

  // Get the length of str_t and store it in s_num
  var s_num = str_t.length;

  // Return true if the lengths of str_p and str_t are equal; otherwise, return false
  return p_num === s_num;
}

// Log the result of calling equal_pt with the given strings to the console
console.log(equal_pt("paatpss"));
console.log(equal_pt("paatps"));

Sample Output:

false
false

Live Demo:

See the Pen JavaScript - Check whether a given string contains equal number of p's and t's - basic-ex-55 by w3resource (@w3resource) on CodePen.


Flowchart:

Flowchart: JavaScript - Check whether a given string contains equal number of p's and t's

ES6 Version:

// Define a function named equal_pt with parameter str
const equal_pt = (str) => {
    // Use regular expressions to replace characters other than 'p' with an empty string
    const str_p = str.replace(/[^p]/g, "");

    // Use regular expressions to replace characters other than 't' with an empty string
    const str_t = str.replace(/[^t]/g, "");

    // Get the lengths of the modified strings
    const p_num = str_p.length;
    const s_num = str_t.length;

    // Return whether the lengths of the 'p' and 't' strings are equal
    return p_num === s_num;
};

// Log the result of calling equal_pt with the given strings to the console
console.log(equal_pt("paatpss"));
console.log(equal_pt("paatps"));

Previous: JavaScript program to count the number of vowels of a given string.
Next: JavaScript program to divide two positive numbers and return a string with properly formatted commas.

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