Junior Developer Central JS Practice Exercise - 05

 

Question: 

Write a Javascript program to create a new string adding 'New!' in front of a given string. If the given string begins with 'New!' already then return the original string. 

Answer: 

function newStr (str) {

let str001 = str; 

if (str001.slice(0,4) === 'New!') {

return str001;

} else {

let str002 = 'New! ' + str001; 

console.log(str002); 

}

}

> we declare a function 'newStr'

> it has one parameter 'str' 

> we declare a variable 'str001'

> we initialize it with a value of the argument 'str'

> we then use if / else statements to check if the string 'str001' begins with 'New!' 

> we use the slice function to check if the string 'str001' begins with 'New!' 

> we return the string 'str001' if it does

> if the string 'str001' it does not begin with 'New!' then we declare another variable 'str002' 

> we initialize the value of the same by concatenating 'New! ' (with a space after the exclamation mark) with the original string variable 'str001' 

> we then console.log 'str002'