How many spaces are there? Your task is to input a string, and output the number of spaces in the string.

This is code-golf, so least number of bytes win. Your 

Test Cases

Double quotes are not part of the test cases.

"test" =&gt; 0
"Hello, World!" =&gt; 1
"C O D E G O L F" =&gt; 7
"      " =&gt; 6
APL (Dyalog Extended), 3 bytesSBCS



+/=


Try it online!

+/ sum the mask where = equal to the prototypical element of that element, which is space for characters.