Added a simple way to convert between strings and integer

[1baga]

Added a simple way to convert an Integer to a string and vice versa. Useful when you are making quick conversions to be put in one line of code. Also added the modulus math operation.

[BolajiAyodeji]

Looks great!
You need to run some fixes first.

• Your Integer to String conversion doesn't seem to work, I get 34 instead of "34"
• You should use the camel case style to name your variables
  age_toString should be ageToString
length_toInt should be lengthToInt

[BolajiAyodeji]

Looks great!
Change the variable name from modulus to findModulus

[BolajiAyodeji]

Looks great!
Change the variable name from modulus to findModulus

You haven't made this change @1baga

[1baga]

Looks great!
Change the variable name from modulus to findModulus

You haven't made this change @1baga

done

[BolajiAyodeji]

Looks great!
Thank you.

[BolajiAyodeji]

@all-contributors please add @1baga for code

[allcontributors]

@BolajiAyodeji

I've put up a pull request to add @1baga! 🎉