CODEWITHSUNDEEP
python
RustedCorpse
RustedCorpse

Reputation: 1

Most efficient way to convert str to int and back in python?

This works, but I feel it's not efficient to define a new variable just for a print call. IS there a better method to take an input and print it as a string. Then convert it to an int and possibly back yet again to a str? I read up on the % command but don't believe I'm incorporating it correctly.

Number test for if and block manuvering.

print ('This is a program to choose two numbers adding up to ten')
firstInput = input(" Pick a number? ")
firstNumber = int (firstInput)

print ('Ok the base number is ' + firstInput + ' so make that 10')

newNumber = int(input(' Number to add? '))


if newNumber + firstNumber == 5 + 5:
    print ("That worked!")

if newNumber + firstNumber != 5 + 5:
    print ("That didn't work!")`

Upvotes: 0

Views: 109

Answers (1)

Martijn Pieters
Martijn Pieters

Reputation: 1122232

Use string formatting to interpolate integers:

print('Ok the base number is {} so make that 10'.format(firstNumber))

You can do much more complex formatting, but in this basic example the value for the first slot ({}) is taken from the first argument (firstNumber), which automatically is converted to a string with the str() built-in function.

As a complete program, with a few small optimizations:

print ('This is a program to choose two numbers adding up to ten')
firstNumber = int(input(" Pick a number? "))

print('Ok the base number is {} so make that 10'.format(firstNumber))

newNumber = int(input(' Number to add? '))

if newNumber + firstNumber == 10:
    print("That worked!")
else:
    print("That didn't work!")`

Upvotes: 2

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