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Introduction to JavaScript (staging)
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Introduction to JavaScript (staging)

Introduction to JavaScript (staging)

1. Introduction
Writing our first codeOutput Using Variables 1/2Output Using Variables 2/2
2. JavaScript syntax
JavaScript SyntaxJavaScript VariablesJavaScript OperatorsIdentifiers in JavaScriptNaming IdentifiersReserved keywords in JavaScriptNaming Convention in JavaScript. Case StylesVariables Naming ConventionBoolean Naming ConventionConstant Naming ConventionFunction & Classes Naming ConventionMultiline StringsMultiline Strings. ConcatenatingCommenting in JavaScriptCommenting in JavaScript. Multi-line Comments
3. Data Types and Variables
What are Variables?What are Data-types?JavaScript and Type ConversionVar 1/3Var 2/3Var 3/3Let 1/2Let 2/2Constant 1/3Constant 2/3Constant 3/3Number 1/3Number 2/3Number 3/3Boolean 1/4Boolean 2/4Boolean 3/4Boolean 4/4Strings 1/5Strings 2/5Strings 3/5Strings 4/5Strings 5/5BigInt 1/3BigInt 2/3BigInt 3/3Symbols 1/3Symbols 2/3Symbols 3/3NullUndefinedNull vs Undefined

bookNumber 3/3

Other Math Functions

JavaScript has a library by the name of Math that has many built-in mathematics functions and methods. Let’s look at a few of them.

  • Math.random():
    The Math.random() is a function in JavaScript, that gives random numbers between 0 and 1 but not including 1, for example.

              
123

            
console.log(Math.random());
console.log(Math.random());
console.log(Math.random());
copy

As you can see we get three different numbers between 0 and 1.

Note:
You may get different output as Math.random() gives random numbers.

  • Math.max() and Math.min():
    The Math.max() returns the greatest number of all the numbers passed in as an argument while Math.min() returns the smallest one.

              
12

            
console.log(Math.max(3, 5, -10, 100, 1));
console.log(Math.min(1, 2, 6, 0, -15));
copy
  • Math.pow(base, power):
    The Math.pow(base, power) returns base raised to the given power, for example.

              
1

            
console.log(Math.pow(2, 10));
copy

Tarefa

The task is to find the volume of a cylinder. The radius and height variables are given to storing the radius and the height of the cylinder. The formula for the volume of the cylinder is:
V = πhr²
where π is the Math PI having the value of 3.1415, r is the radius, and h is the height. Your task is to create a new const variable named PI and store 3.1415 in it and implement this formula storing the result in a variable named volume.

Summary

  • JavaScript provides the facility of rounding numbers.
  • We can check whether a variable is finite or infinite through the isFinite() function.
  • We can check whether a variable is a number or not through the isNaN() function.
  • The Math.random() function is used to get a random numeric value from 0 to 1(excluding 1).

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Tudo estava claro?

Como podemos melhorá-lo?

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Seção 3. Capítulo 14
toggle bottom row

bookNumber 3/3

Other Math Functions

JavaScript has a library by the name of Math that has many built-in mathematics functions and methods. Let’s look at a few of them.

  • Math.random():
    The Math.random() is a function in JavaScript, that gives random numbers between 0 and 1 but not including 1, for example.

              
123

            
console.log(Math.random());
console.log(Math.random());
console.log(Math.random());
copy

As you can see we get three different numbers between 0 and 1.

Note:
You may get different output as Math.random() gives random numbers.

  • Math.max() and Math.min():
    The Math.max() returns the greatest number of all the numbers passed in as an argument while Math.min() returns the smallest one.

              
12

            
console.log(Math.max(3, 5, -10, 100, 1));
console.log(Math.min(1, 2, 6, 0, -15));
copy
  • Math.pow(base, power):
    The Math.pow(base, power) returns base raised to the given power, for example.

              
1

            
console.log(Math.pow(2, 10));
copy

Tarefa

The task is to find the volume of a cylinder. The radius and height variables are given to storing the radius and the height of the cylinder. The formula for the volume of the cylinder is:
V = πhr²
where π is the Math PI having the value of 3.1415, r is the radius, and h is the height. Your task is to create a new const variable named PI and store 3.1415 in it and implement this formula storing the result in a variable named volume.

Summary

  • JavaScript provides the facility of rounding numbers.
  • We can check whether a variable is finite or infinite through the isFinite() function.
  • We can check whether a variable is a number or not through the isNaN() function.
  • The Math.random() function is used to get a random numeric value from 0 to 1(excluding 1).

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu feedback!

Seção 3. Capítulo 14
toggle bottom row

bookNumber 3/3

Other Math Functions

JavaScript has a library by the name of Math that has many built-in mathematics functions and methods. Let’s look at a few of them.

  • Math.random():
    The Math.random() is a function in JavaScript, that gives random numbers between 0 and 1 but not including 1, for example.

              
123

            
console.log(Math.random());
console.log(Math.random());
console.log(Math.random());
copy

As you can see we get three different numbers between 0 and 1.

Note:
You may get different output as Math.random() gives random numbers.

  • Math.max() and Math.min():
    The Math.max() returns the greatest number of all the numbers passed in as an argument while Math.min() returns the smallest one.

              
12

            
console.log(Math.max(3, 5, -10, 100, 1));
console.log(Math.min(1, 2, 6, 0, -15));
copy
  • Math.pow(base, power):
    The Math.pow(base, power) returns base raised to the given power, for example.

              
1

            
console.log(Math.pow(2, 10));
copy

Tarefa

The task is to find the volume of a cylinder. The radius and height variables are given to storing the radius and the height of the cylinder. The formula for the volume of the cylinder is:
V = πhr²
where π is the Math PI having the value of 3.1415, r is the radius, and h is the height. Your task is to create a new const variable named PI and store 3.1415 in it and implement this formula storing the result in a variable named volume.

Summary

  • JavaScript provides the facility of rounding numbers.
  • We can check whether a variable is finite or infinite through the isFinite() function.
  • We can check whether a variable is a number or not through the isNaN() function.
  • The Math.random() function is used to get a random numeric value from 0 to 1(excluding 1).

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu feedback!

Other Math Functions

JavaScript has a library by the name of Math that has many built-in mathematics functions and methods. Let’s look at a few of them.

  • Math.random():
    The Math.random() is a function in JavaScript, that gives random numbers between 0 and 1 but not including 1, for example.

              
123

            
console.log(Math.random());
console.log(Math.random());
console.log(Math.random());
copy

As you can see we get three different numbers between 0 and 1.

Note:
You may get different output as Math.random() gives random numbers.

  • Math.max() and Math.min():
    The Math.max() returns the greatest number of all the numbers passed in as an argument while Math.min() returns the smallest one.

              
12

            
console.log(Math.max(3, 5, -10, 100, 1));
console.log(Math.min(1, 2, 6, 0, -15));
copy
  • Math.pow(base, power):
    The Math.pow(base, power) returns base raised to the given power, for example.

              
1

            
console.log(Math.pow(2, 10));
copy

Tarefa

The task is to find the volume of a cylinder. The radius and height variables are given to storing the radius and the height of the cylinder. The formula for the volume of the cylinder is:
V = πhr²
where π is the Math PI having the value of 3.1415, r is the radius, and h is the height. Your task is to create a new const variable named PI and store 3.1415 in it and implement this formula storing the result in a variable named volume.

Summary

  • JavaScript provides the facility of rounding numbers.
  • We can check whether a variable is finite or infinite through the isFinite() function.
  • We can check whether a variable is a number or not through the isNaN() function.
  • The Math.random() function is used to get a random numeric value from 0 to 1(excluding 1).

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Seção 3. Capítulo 14
Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
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