Fichas
Python basic programming technique
Fichas del conjunto (15)
- 1Define a constant and define a variable?constant:
A constant is a memory location used to store a value that cannot be changed whilst the program is running
variable:
A variable is a memory location used to store a value that can be changed whilst the program is running - 2name and give an example of all data types used in programming?string:"Hello"
integer: "3"
floating/real number: "3.5"
boolean: "true"
character: "K" - 3What is casting?casting is used to convert one data type into another. For example:
int(string variable) this would convert a string into an integer. - 4state common arithmatic operators?+ addition adds two or more values together
- subtraction takes the second value from the first value
*multiplication multiplies two or more values together
/real division divides first value by second value
//integer division used to find the quotient(integer number before the decimal point) after division
%remainder used to find remainder(modulus) after division
**exponential raises the value to the power of the exponential - 5what is the difference between modulus and quotient division?Modulus division finds the remainder of the sum and quotient division finds the whole number or integer of the sum.
- 6What is a sequence and give an example?A sequence is a pre-determined order carried out into the next one. No action can be skipped in the sequence.Example:
cat = input("Enter name of your cat")
name = input("Enter you name")
print("Your name is",name,"and your cats name is",cat,) - 7What is a selection and give an example?Selection is an algorithm to choose between two or more options. We use the if the else structure make decisions about which path to follow. Example:
Passcode = input("Enter passcode")
If passcode =="Go":
print("Allow unrestricted access
Else:
print("Deny all access") - 8what is a iteration and give an example?Iteration is the process of repeating a set of instructions a fixed number of times or until a condition is met. The two types of loops are:
count-controlled-for loops
condition controlled-while loops
Example:
for x in range(1,6)
while fruit =="bannanas": - 9define the term string concatenation?String concatenation is when you join strings together using + sign example:
string1 = input("Enter favourite colour")
string2 = "cat"
newstring = string1+""+string2
print(newstring) - 10What does x.upper() do in python?x is now all upper case letters
- 11what does x.lower() do in python?x is now all lower case letters
- 12what does len(x) do in python?Calculates the number of characters in a string
- 13what does x[index] do in python?extracts that character from the string starts at 0 example:
x = "Hello"
print(x[2])
it would print l - 14what does x[a:b] do in python?extracts string starting at position a and finish at position b. Example:
x = "hello"
print(x[0:4]
it would print hell - 15what does x.substring(a,b) do in javascript?extracts a string starting at position a with a length of b. Example:
x = "hello"
print(x.substring(0,2))
this would print he