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@@ -1,31 +1,29 @@
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-// //assign: evaluation
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+//assign: evaluation
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var a = 5;
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var b, c;
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-// //if we delete brackets functionality is same
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-// // b = (a * 5);
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-// // b = (c = b/2);
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-// // a = 5
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-// // b = 12,5
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-// // c = 12,5
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-
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-//one line variant
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-c = b = (a * 5) / 2;
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-
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-// // forgot one semicolon!
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-// // for(let i = 0 i < 5; i++) {
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-// // console.log(i)
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-// // }
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-// // wrong usage of semicolon
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-// //let a; b = 5;
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-// //b = 5 c = b + 1;
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-
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-// //semicolon logic errors
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-// // if(a === 5) {
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-// // console.log('FIVE!')
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-// // }else; console.log('not five(')
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-
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-//GET YEAR TASK:
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+c = (b = (a * 5) / 2);
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+// b = (a * 5);
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+// b = (c = b/2);
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+// a = 5
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+// b = 12,5
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+// c = 12,5
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+
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+// forgot one semicolon!
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+// for(let i = 0 i < 5; i++) {
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+// console.log(i)
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+// }
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+
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+// wrong usage of semicolon
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+//let a; b = 5;
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+//b = 5 c = b + 1;
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+
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+//semicolon logic errors
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+// if(a === 5) {
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+// console.log('FIVE!')
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+// }else; console.log('not five')
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+
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+//Number: age
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function getAge(age, currentYear = new Date().getFullYear()) {
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try {
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age = Math.trunc(Number(age))
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@@ -47,8 +45,7 @@ if(year) {
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alert('whoops, looks like invalid input value has been given!')
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}
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-
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-//GET TEMPERATURE TASK:
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+//Number: temperature
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try {
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let grad = Number(prompt("Input temperature",""))
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let sys = prompt(`
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@@ -79,13 +76,13 @@ function getTemperature(value, system="c") {
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}
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}
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-//divide using floor
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+//Number: divide
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function flooredDivide(num1, num2) {
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console.log(num1 / num2)
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return Math.floor(num1 / num2)
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}
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-//infor user if number given is odd task
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+//Number: odd
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function oddInformer() {
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let num = prompt("input a number:", "")
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if(isNaN(+num) || !num) {
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@@ -99,13 +96,15 @@ function oddInformer() {
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}
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}
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+//String: greeting
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//greet user using alert() and prompt()
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function greeting() {
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let name = prompt("Hey user, what's your name")
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alert(`Hello, ${name? name : 'Namless One...'}`)
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}
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-//check if text contains desired words
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+
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+//String: lexis
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function lexis(string, word) {
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if(string.indexOf(word) > 0) {
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return true
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@@ -114,6 +113,9 @@ function lexis(string, word) {
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}
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}
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+//confirm возвращает true либо false по нажатию на кнопки 'Ок' или 'Отмена' соответственно.
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+
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+//Boolean
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let quest1 = confirm('are you a human being?')
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let quest2 = confirm('can you fly?')
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@@ -130,20 +132,23 @@ if(quest1) {
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alert('is machine spirit talking to me?')
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}
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}
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-
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+//Array: real
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let inMyBag = ['shoes', 'shorts', 'shirt', 'laptop', 'charger', 'copybook', 'pen', 'water-bottle']
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+//Array: booleans
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let answers = [quest1, quest2]
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-//toying with arrays
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+//Array: plus
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let plus = [1, 2]
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plus[2] = plus[0] + plus[1]
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console.log(plus)
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+//Array: plus string
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+//возможность можно использовать что бы создавать новые строки из множества строчных значений
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let plusStr = ['hello', 'My', 'World',]
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plusStr[plusStr.length] = plusStr[0] + plusStr[1] + plusStr[2]
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console.log(plusStr)
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-//toying with objects
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+// Object: real
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let keyboard = {
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model: 'sven slim 303',
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type: 'membrane',
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@@ -157,10 +162,11 @@ let guitar = {
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manufacturer: 'Fender'
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}
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+//Object: change
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keyboard.price = '10$'
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guitar['form'] = 'telecaster'
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-//add brackets
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+// Comparison if
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var age = +prompt("Сколько вам лет?","");
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if (age < 18 && age > 0){
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alert("школьник");
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