It is mind blowing how no one has created a calculator where you just type in an expression and get the result. All of the calculators I've seen have you type in one number then press enter then type in +, -, / or * then press enter then type your second number. This calculator takes simple expressions and returns the result.

*No spaces in expressions **Can do addition, subtraction, multiplication, and division. Planning to add more operations in the future. ***Has float/int switcher in division. If is not a whole number it is a float, if it is a whole number it is an int.

@proofofconcept: I take it back, I tried again and it works perfectly. A suggestion would be to switch the float to a int if a decimal is not needed such as 10.0 or 2.0 would become 10 or 2.

@ryanmuraliraj: The calculator now supports variables You type x=0 for example, and then you can use x in expressions However variable names can only be one letter long

## An Actual Calculator

It is mind blowing how no one has created a calculator where you just type in an expression and get the result. All of the calculators I've seen have you type in one number then press enter then type in +, -, / or * then press enter then type your second number. This calculator takes simple expressions and returns the result.

Examples:

Input:1+1 | Output:2

Input:1000-15 | Output:985

Input:10*10 | Output:100

Input:100/10 | Output:10

Input:2/3 | Output:0.666666

Input:0/0 | Output: Error

*No spaces in expressions

**Can do addition, subtraction, multiplication, and division. Planning to add more operations in the future.

***Has float/int switcher in division. If is not a whole number it is a float, if it is a whole number it is an int.

My Calculator:

https://repl.it/@RyanMuraliraj/Calculator

Some of the calculators I was talking about:

https://repl.it/ibuiltthis/p/my-calculator-1

https://repl.it/ibuiltthis/p/calculator

https://repl.it/@HongjiDai/Simple-Calculator

This calculator does it but uses external modules without actually coding it themself:

https://repl.it/ibuiltthis/p/mega-calculator

Shoutout to the creators of the calculators listed above for the idea and inspiration.

pls upvote

This calculator does not use eval but can evaluate arbitrary length expressions, with parentheses. It supports floats.

https://repl.it/@proofofconcept/Basic-recursive-descent-parser

@proofofconcept: I don't know man, I put 2-1 into your calculator and I got -1. I also put 3/2 and I got nan. Regardless, I'm impressed.

@proofofconcept: I take it back, I tried again and it works perfectly. A suggestion would be to switch the float to a int if a decimal is not needed such as 10.0 or 2.0 would become 10 or 2.

@ryanmuraliraj: The calculator now supports variables

You type x=0 for example, and then you can use x in expressions

However variable names can only be one letter long

@proofofconcept: Nice. If you post your calculator on I built this I'll upvote.

@ryanmuraliraj: Ok, I posted it, and added some things as well. This could turn into a programming language if I keep adding these things!

@proofofconcept: Really well done gg fam