Mathmatical expretions and strings
Whats an algarithum?
An algarithum has 3 parts sequencing (order), selection (choice), and Iterations (If true repet)
can be represented in two ways flow charts, and
flowcharts
- oval start or end
- arrow connecter
- parralelagram input/ output
- rectange prosses
- diamond decision
basic operation + - * / % whats modulis? remander after divistion 3%2 = 1
PEMDAS ()^*/+-
varables can be a vaulue, another varables value, and an operations value
SEQUENCING IS IMPORTANT!!!
var1 = 9 var2 = 7 var3 = 2
#var1 = var1 + 5 #var2 = var1 - var3 #var1 = var2 #var3 = (var1 + var2) / 2 #var2 = 6
print(var1) print(var2) print(var3)
what is a String? A string is a colection of characters Can be used in different perseders Python length .lower .cap colage bord concat subtring
what is concatination? combines strings together what is substring? it is a part of a string like substring 2 would give you the first 2 letters in the string