Print a numeric variable

MyString = "abc" +  str(MyValue) + "def"
MyString += "hij"

Insert variables into a string

Inserting strings

#Insert variables directly (NOTE THE 'f' BEFORE THE STRING!! - requried for this)
my_string = f"Something {string_a} blah {string_b}"

Inserting values

#Insert variables directly (NOTE THE 'f' BEFORE THE STRING!! - requried for this)
my_string = f"Something {str(my_int_value)} blah {str(my_float_value)}"

Decimal places

For a float value

my_string += f"\nBrightness: {round(my_value, 1)}"    #Limit value to 1 decimal place

For an integer value

my_string += f"\nBrightness: {round(float(my_value), 1)}"    #Limit value to 1 decimal place

Convert string to value

See here