did first assignment

01week/datatypes.js

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+'use strict'
+// 1. get date & time and console log them:
+const date = new Date();
+console.log('The date and time is' + ' ' + date + '.');
+
+// 2. turn a number into a string and log it:
+function numToString(num) {
+  let n = num.toString();
+  console.log('The number turned into a string is' + ' ' + n + '.');
+}
+numToString(666);
+numToString(1080);
+
+// 3. parse a string to return a number:
+function stringToNum(string) {
+  console.log('The string parsed into a number is' + ' ' + parseInt(string) + '.');
+}
+stringToNum('1234');
+stringToNum('5280');
+
+// 4. function to return type of variable:
+function type(x) {
+  console.log('The variable'+ ' ' + x + ' ' + 'is a(n)' + ' ' + typeof x + '.');
+}
+// 5. some variable examples run through the type function:
+let declaredButUndefined;
+let nullVar = null;
+type('Hello');
+type(1234);
+type(NaN);
+type(declaredButUndefined);
+type(!NaN);
+type(12 === 12);
+type(nullVar);
+type(date);
+
+// 6. function to add two numbers:
+function add(a, b) {
+  let sum = a + b;
+  console.log('The result of' + ' ' + a + ' + ' + b + ' ' + 'is' + ' ' + sum + '.');
+}
+add(2, 6);
+add(15, 32);
+add(1028, 900);
+
+// 7. function which only runs if two things are both true:
+function bothTrue(a, b) {
+  if(a && b) {
+    console.log('Both things are true!');
+  }
+}
+// not both true:
+bothTrue(10<8, 15<20);
+// both true:
+bothTrue(10>8, 15<20);
+
+// 8. function which runs if at least one of two things is true:
+function oneTrue(a, b) {
+  if(a || b) {
+    console.log('At least one thing is true!');
+  }
+}
+oneTrue(!NaN, NaN);
+oneTrue(10<8, 15<20);
+
+// 9. function which runs if two things are both false:
+function bothFalse(a, b){
+  if(!a && !b) {
+    console.log('Both things are false!');
+  }
+}
+bothFalse(!NaN, NaN);
+bothFalse(10<8, 15>20);