JavaScript: Insert dashes (-) between each two even digits of a specific number
JavaScript Array: Exercise-6 with Solution
Write a JavaScript program that accepts a number as input and inserts dashes (-) between each even number. For example if you accept 025468 the output should be 0-254-6-8.
Sample Solution:
JavaScript Code:
// Prompt the user for input and store it in the 'num' variable
var num = window.prompt();
// Convert the number to a string and store it in the 'str' variable
var str = num.toString();
// Initialize an array 'result' with the first character of the string
var result = [str[0]];
// Iterate through the characters of the string starting from index 1
for (var x = 1; x < str.length; x++) {
// Check if the previous and current characters are both even digits
if (str[x - 1] % 2 === 0 && str[x] % 2 === 0) {
// If both are even, push a '-' and the current character to the 'result' array
result.push('-', str[x]);
} else {
// If not both even, push the current character to the 'result' array
result.push(str[x]);
}
}
// Output the joined 'result' array as a string
console.log(result.join(''));
Output:
0-254-6-8
Flowchart:
ES6 Version:
// Prompt the user for input and store it in the 'num' variable
const num = window.prompt();
// Convert the number to a string and store it in the 'str' variable
const str = num.toString();
// Initialize an array 'result' with the first character of the string
const result = [str[0]];
// Iterate through the characters of the string starting from index 1
for (let x = 1; x < str.length; x++) {
// Check if the previous and current characters are both even digits
if (str[x - 1] % 2 === 0 && str[x] % 2 === 0) {
// If both are even, push a '-' and the current character to the 'result' array
result.push('-', str[x]);
} else {
// If not both even, push the current character to the 'result' array
result.push(str[x]);
}
}
// Output the joined 'result' array as a string
console.log(result.join(''));
Live Demo:
See the Pen JavaScript - Insert dashes (-) between each two even digits of a specific number- array-ex-6 by w3resource (@w3resource) on CodePen.
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