add topic_1

.gitignore

@@ -0,0 +1 @@
+.idea

topic_1/script.js

@@ -0,0 +1,125 @@
+console.log("Задание 1 ----------");
+let hello = "Hello world!";
+let message;
+message = hello;
+console.log(hello, message);
+
+console.log("Задание 2 ----------");
+function auto(x1, x2, s1, t) {
+  let speed = x1 + x2;
+  let s2 = speed * t;
+  let endS = s1 - s2;
+  if (endS < 0) {
+    return -endS;
+  }
+  return endS;
+}
+console.log(auto(5, 5, 50, 6));
+
+console.log("Задание 3.1 ----------");
+function f3(a, b) {
+  if (a < b) {
+    return a + b;
+  }
+  if (a > b) {
+    return a - b;
+  }
+  return a * b;
+}
+console.log(f3(1,2));
+console.log(f3(2,1));
+console.log(f3(2,2));
+
+console.log("Задание 3.2 ----------");
+function f3_2(num) {
+  switch(num) {
+  case 1:
+    return "зима"
+  case 2:
+    return "весна"
+  case 3:
+    return "лето"
+  case 4:
+    return "осень"
+  default:
+    return "Кто ты такой?"
+  }
+}
+console.log(f3_2(1));
+console.log(f3_2(2));
+console.log(f3_2(3));
+console.log(f3_2(4));
+console.log(f3_2(5));
+
+console.log("Задание 4.1 ----------");
+for (var i = 1; i <= 100; i++) {
+  console.log(i);
+}
+console.log("Задание 4.2 ----------");
+for (var i = 11; i <= 33; i++) {
+  console.log(i);
+}
+console.log("Задание 4.2 ----------");
+let sum = 0;
+for (var i = 1; i <= 100; i++) {
+  sum += i;
+}
+console.log(sum);
+
+console.log("Задание 5 ----------");
+function f5(s) {
+  return s === s.split("").reverse().join("")
+}
+console.log(f5("hello"));
+console.log(f5("ollo"));
+
+console.log("Задание 6 ----------");
+function len(s1, s2) {
+  return s1.length + s2.length
+}
+console.log(len("hello", "world"));
+
+console.log("Задание 7.1 ----------");
+console.log([1,2,3].concat([4,5,6]));
+console.log("Задание 7.2 ----------");
+console.log([1,2,3].reverse());
+console.log("Задание 7.3 ----------");
+let arr7_3 = [1,2,3]
+arr7_3.push(4,5,6)
+console.log(arr7_3);
+console.log("Задание 7.4 ----------");
+let arr7_4 = [1,2,3]
+arr7_4.unshift(4,5,6)
+console.log(arr7_4);
+console.log("Задание 7.5 ----------");
+console.log(['js', 'css', 'jq'][0]);
+console.log("Задание 7.6 ----------");
+let arr7_6 = ['js', 'css', 'jq']
+let last = arr7_6[arr7_6.length - 1]
+console.log(last);
+console.log("Задание 7.7 ----------");
+let arr7_7 = [1,2,3,4,5]
+let a7_7 = arr7_7.slice(0,3)
+console.log(a7_7);
+let b7_7 = arr7_7.slice(3,5)
+console.log(b7_7);
+console.log("Задание 7.8 ----------");
+let arr7_8_1 = [1,2,3,4,5]
+arr7_8_1.splice(1, 2)
+console.log(arr7_8_1);
+let arr7_8_2 = [1,2,3,4,5]
+arr7_8_2.splice(5, 0, 2, 3, 4)
+console.log(arr7_8_2);
+console.log("Задание 7.9 ----------");
+console.log([3, 4, 1, 2, 7].sort());
+
+console.log("Задание 8.1 ----------");
+function f8_1(a, b) {
+  return Math.pow(a, b);
+}
+console.log(f8_1(2,3));
+console.log("Задание 8.2 ----------");
+function f8_2(a, b, round) {
+  return a * b * Math.sin(round / 180 * Math.PI) / 2;
+}
+console.log(f8_2(2, 3, 90));