JavaScript: Return true if the string is y/yes other wise false

JavaScript fundamental (ES6 Syntax): Exercise-26 with Solution

Write a JavaScript program that returns true if the string is y/yes or false if the string is n/no.

• Use RegExp.prototype.test() to check if the string evaluates to y/yes or n/no.
• Omit the second argument, def to set the default answer as no.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const yes_No = (val, def = false) =>
  /^(y|yes)$/i.test(val) ? true : /^(n|no)$/i.test(val) ? false : def;
console.log(yes_No('Y')); 
console.log(yes_No('yes'));  
console.log(yes_No('No')); 
console.log(yes_No('Foo', true));  

Note: Omit the second argument, def to set the default answer as no.

Sample Output:

true
true
false
true

Pictorial Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-1-26 by w3resource (@w3resource) on CodePen.

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