learnjavascript

Author: Jawahar98It

datavalue.js

@@ -0,0 +1,58 @@
+const prompt = require("prompt-sync")();
+console.log("Hello javascript")
+let name = "Fair";
+console.log(name);
+let firstName = "Sara"; 
+let lastName = "Baker";
+console.log(firstName+" "+lastName)
+const interestRate = 5.5
+console.log(interestRate)
+console.log(typeof(name))
+console.log(typeof(interestRate))
+colorSelected = null
+console.log(typeof(colorSelected))
+let person ={name:"Doku",age:34}
+console.log(person)
+person.name = "Goku";
+console.log(person.name)
+person['name'] = "Mary";
+console.log(person.name)
+console.log(person)
+let selectedColors = ['red','blue'];
+console.log(typeof(selectedColors));
+console.log(selectedColors[1])
+selectedColors[2]='yellow';
+selectedColors[3]='orange';
+console.log(selectedColors)
+selectedColors[4]=22
+selectedColors[5]=90.5
+console.log(selectedColors)
+console.log(selectedColors.length)
+function greet(firstName,lastName)
+{
+    firstName = 'Stewart';
+    lastName='Sony';
+    return firstName+""+lastName
+}
+console.log(greet(firstName,lastName))
+function squareNumber(num)
+{
+    return num * num
+}
+let num = prompt("Enter the number:")
+num = Number(num)
+const squareValue = squareNumber(num)
+console.log(squareValue)
+
+let number_value = [1,2,3,5,6,-2,-3,-9]
+const filtered_data = number_value.filter(function(value)
+{
+    return value>=0;
+})
+console.log(filtered_data)
+const filtered = number_value.filter(n => n<= 0)
+console.log(filtered)
+const items = filtered_data.map(n=>'<li>'+n+'</li>')
+const straw ='<ul>'+ items.join('')+'</ul>';
+console.log(items)
+console.log(straw)