whats does the = sign with two dots above and below it mean? (1 Viewer)

[MrBrightside]

its like a divided by sign by with = in the middle.

i'm guessing it means = around that number. ??

 

[hscmathstutor10]

it means " approximately equal to "

if you you see two lines that look like the = but are swiggly then that also means approximately to