Jan 01, 2020 · Python input() function always convert the user input into a string. but how to check user input is a number. We can Convert string input to int or float type to check string input is an integer type. also using isdigit() method of string class we can check input string is number or string. Hi, I'm having trouble trying to figure out a code that converts negative decimal numbers to binary, as well as specifying the number of bits. For example. convert -18 using 8 bits. This should come out as 10010010 doing it manually, I think. Python - Convert negative decimals from string to float. I need to read in a large number of .txt files, each of which contains a decimal (some are positive, some are negative), and append these into 2 arrays (genotypes and phenotypes). Dec 07, 2017 · Some of the times we need to use positive or negative infinity as a value. For example, it is used in algorithms where you need to compare the current solution to the best solution so far. Usually at the initiation step, we like to set the cost/value to positive or negative infinity to make sure no other value in our input would be bigger/smaller. Numbers are used to store numerical values in the program. Python support three types of numbers – int, float, and complex. Python 2 also supports “long” but it’s deprecated in Python 3. Python Program to Check if a Number is Positive, Negative or 0 using Using Nested if If you notice the output of both the Programs is the same, so we can use any method to Check if a Number is Positive, Negative or zero.