You should use a single space after the following punctuation:
Full stop (period)
|My best friends are Thomas,Alwyn,Antony and Soniya.But none of them live near my home.|
|My best friends are Thomas, Alwyn, Antony and Soniya. But none of them live near my home.|
1. Use no space before and after the hyphen (dash)
2. Do not use space before or after the full stop (period) in abbreviations (Example: 10a.m.)
3. Do not use space before or after color (:) while writing ratios (Example: 10:20)
4. Do not use space after the period in decimal numbers.