Tag: function

National 5 – SDD Predefined Functions

So today we were looking over predefined function. For the N5 course we have to be aware of RANDOM, ROUND, & LENGTH.

The RANDOM function picks an integer between two values.

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import random
number=random.randint(1,20) # random(StartValue,EndValue)
print(number)

The ROUND function rounds a real number (floating point) to a fixed number of decimal points.

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a=1.2 # 1
b=2.6 # 3
c=2.5 # 2
d=3.5 # 4
e=3.453444354
 
print(round(e,2)) # round(valueToRound,NoOfDecimalDigits)

The LENGTH function displays the number of characters in a String or the length of an Array.

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name="Stratton was here"
numbers=[1,2,3,4,2,3,4,6,4,3,2,43]
print(len(name))
print(len(numbers))
print(numbers)
 
for index in range(len(numbers)):
    print(numbers[index])
 
for index in range(len(name)):
    print(name[index])

 

Python Functions

A function is a predefined block of code which is used then programming. It often contains a number of commands and steps.

Here are some of the functions we have met

print()

This function displays the string that is contained in it parenthesis ().

print(‘Hi there, how are you?)

input()

This function displays the string in its parenthesis but allows the user to enter a string that is then returned and assigned to a variable.

age=input(‘What is your age?’)

str()

Converts the contents of its parenthesis to a string

check=input(‘Is your age ‘+str(age))

len()

Outputs the length (number of characters) of a string or the size (number of elements) in an array

print(‘The length of your name is’,len(name))

float()

Converts a value to a floating point number

weight=float(input(‘How many KG do you weight’))

int()

Converts a value to an integer

age=int(input(‘What is your age?’))