const days = ['sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday'];

​

let capitalize = days.map(day => day.charAt(0).toUpperCase() + day.slice(1).toLowerCase());

​

console.log(capitalize);

 Run code snippet

const lower = 'this is an entirely lowercase string';

const upper = lower.charAt(0).toUpperCase() + lower.substring(1);

const string = "tHIS STRING'S CAPITALISATION WILL BE FIXED."

const string = string.charAt(0).toUpperCase() + string.slice(1)

function capitalizeFirstLetter(string) {

     return string.charAt(0).toUpperCase() + string.slice(1);

}

​

​

function capitalizeFirstLetter(string) {

return string.charAt(0).toUpperCase() + string.slice(1);

}

// this will only capitalize the first word

var name = prompt("What is your name");

firstLetterUpper = name.slice(0,1).toUpperCase();

​

alert("Hello " + firstLetterUpper + name.slice(1, name.length).toLowerCase());

​

function capitalizeFirstLetter(string) {

  return string.charAt(0).toUpperCase() + string.slice(1);

}

​

console.log(capitalizeFirstLetter('foo')); // Foo

 Run code snippet

function capitalize(word) {

    return word.charAt(0).toUpperCase() + word.toLocaleLowerCase().substring(1)

}

capitalize("bob");

let val = '  this is test ';

val = val.trim();

val = val.charAt(0).toUpperCase() + val.slice(1);

console.log("Value => ", val);

const days = ['sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday'];

​

let capitalize = days.map(day => day.charAt(0).toUpperCase() + day.slice(1).toLowerCase());

​

console.log(capitalize);

 Run code snippet

const names = ["alice", "bob", "charlie", "danielle"]

// -->        ["Alice", "Bob", "Charlie", "Danielle"]

​

//Just use some anonymous function and iterate through each of the elements in the array

//and take string as another array

let namescap = names.map((x)=>{

    return x[0].toUpperCase()+x.slice(1)

})

console.log(namescap)