Numbers<\/strong> are used to:<\/p>\n Count things<\/p>\n<\/li>\n Do calculations<\/p>\n<\/li>\n Solve math problems<\/p>\n<\/li>\n<\/ul>\n Python supports different kinds of numbers.<\/p>\n Python mainly has three types of numbers<\/strong>:<\/p>\n Integer ( Float ( Complex ( Beginners mostly use int<\/strong> and float<\/strong>.<\/p>\n An integer<\/strong> is a whole number<\/strong>. A float<\/strong> is a number with a decimal point<\/strong>.<\/p>\n Complex numbers have:<\/p>\n a real part<\/p>\n<\/li>\n an imaginary part<\/p>\n<\/li>\n<\/ul>\n \ud83d\udc49 Beginners usually don\u2019t use this now.<\/p>\n Python can do all common math.<\/p>\n Use \ud83d\udc49 Decimal part is removed.<\/p>\n Input is always text<\/strong>, so convert it.<\/p>\n \u2714 Correct:<\/p>\n Output:<\/p>\n Python always returns float for \n
2. Types of Numbers in Python<\/h3>\n
\n
int<\/code>)<\/p>\n<\/li>\nfloat<\/code>)<\/p>\n<\/li>\ncomplex<\/code>)<\/p>\n<\/li>\n<\/ol>\n3. Integer Numbers (
int<\/code>)<\/h3>\n
It has no decimal point<\/strong>.<\/p>\nExamples<\/h3>\n
age = 25<\/span>
\nscore = 100<\/span>
\ntemperature = -5<\/span><\/code><\/code>print<\/span>(age)
\nprint<\/span>(score)
\nprint<\/span>(temperature)<\/div>\n<\/div>\n4. Float Numbers (
float<\/code>)<\/h3>\nExamples<\/h3>\n
price = 19.99<\/span>
\npi = 3.14<\/span>
\nheight = 5.6<\/span><\/code><\/code>print<\/span>(price)
\nprint<\/span>(pi)
\nprint<\/span>(height)<\/div>\n<\/div>\n5. Complex Numbers (
complex<\/code>) (Basic Idea)<\/h3>\n\n
Example<\/h3>\n
x = 2<\/span> + 3j<\/span>
\nprint<\/span>(x)
\n<\/code><\/div>\n<\/div>\n6. Basic Math Operations with Numbers<\/h3>\n
Addition<\/h3>\n
a = 10<\/span>
\nb = 5<\/span>
\nprint<\/span>(a + b)
\n<\/code><\/div>\n<\/div>\nSubtraction<\/h3>\n
print<\/span>(a - b)
\n<\/code><\/div>\n<\/div>\nMultiplication<\/h3>\n
print<\/span>(a * b)
\n<\/code><\/div>\n<\/div>\nDivision<\/h3>\n
print<\/span>(a \/ b)
\n<\/code><\/div>\n<\/div>\n7. Other Useful Number Operations<\/h3>\n
Power (Exponent)<\/h3>\n
print<\/span>(2<\/span> ** 3<\/span>) # 2 \u00d7 2 \u00d7 2<\/span>
\n<\/code><\/div>\n<\/div>\nModulus (Remainder)<\/h3>\n
print<\/span>(10<\/span> % 3<\/span>)
\n<\/code><\/div>\n<\/div>\nFloor Division<\/h3>\n
print<\/span>(10<\/span> \/\/ 3<\/span>)
\n<\/code><\/div>\n<\/div>\n8. Checking Number Type<\/h3>\n
type()<\/code> to see number type.<\/p>\nExample<\/h3>\n
x = 10<\/span>
\ny = 10.5<\/span><\/code><\/code>print<\/span>(type<\/span>(x))
\nprint<\/span>(type<\/span>(y))<\/div>\n<\/div>\n9. Converting Between Number Types<\/h3>\n
Integer to Float<\/h3>\n
a = 5<\/span>
\nb = float<\/span>(a)
\nprint<\/span>(b)
\n<\/code><\/div>\n<\/div>\nFloat to Integer<\/h3>\n
x = 12.9<\/span>
\ny = int<\/span>(x)
\nprint<\/span>(y)
\n<\/code><\/div>\n<\/div>\n10. Taking Number Input from User<\/h3>\n
Example<\/h3>\n
a = int<\/span>(input<\/span>(\"Enter first number: \"<\/span>))
\nb = int<\/span>(input<\/span>(\"Enter second number: \"<\/span>))<\/code><\/code>print<\/span>(“Sum:”<\/span>, a + b)<\/div>\n<\/div>\n11. Common Beginner Mistakes<\/h3>\n
\u274c Forgetting Conversion<\/h3>\n
num = input<\/span>(\"Enter number: \"<\/span>)
\nprint<\/span>(num + 5<\/span>)
\n<\/code><\/div>\n<\/div>\nnum = int<\/span>(input<\/span>(\"Enter number: \"<\/span>))
\nprint<\/span>(num + 5<\/span>)
\n<\/code><\/div>\n<\/div>\n\u274c Dividing Integers Expecting Integer<\/h3>\n
print<\/span>(5<\/span> \/ 2<\/span>)
\n<\/code><\/div>\n<\/div>\n2.5
\n<\/code><\/div>\n<\/div>\n\/<\/code>.<\/p>\n12. Simple Practice Examples<\/h3>\n
Example 1: Simple Calculator<\/h3>\n
a = 20<\/span>
\nb = 4<\/span><\/code><\/code>print<\/span>(“Add:”<\/span>, a + b)
\nprint<\/span>(“Subtract:”<\/span>, a – b)
\nprint<\/span>(“Multiply:”<\/span>, a * b)
\nprint<\/span>(“Divide:”<\/span>, a \/ b)<\/div>\n<\/div>\nExample 2: Area of Rectangle<\/h3>\n