Basic math symbols

Basic math symbols 

Symbol	Symbol Name	Symbol Meaning	Example
>	Strict Inequality	Greater than	5 > 4 5 is greater than 4
<	Strict Inequality	Less than	4 < 5 4 is less than 5
≥	Inequality	greater than or equal to	5 ≥ 4, x ≥ y means x is greater than or equal to y
≤	Inequality	Less than or equal to	4 ≤ 5, x ≤ y means x is less than or equal to y
=	Equals Sign	Equality	5 = 2+3 5 is equal to 2+3
≠	Not equal sign	Inequality	5 ≠ 4 5 is not equal to 4
≈	Approximately Equal	Approximation	sin(0.01) ≈ 0.01, x ≈ y means x is approximately equal to y
( )	Parentheses	Calculate expression inside first	2 × (3+5) = 16
[ ]	Brackets	Calculate expression inside first	[(1+2)×(1+5)] = 18
+	Plus Sign	Addition	2 + 2 = 4
−	Minus Sign	Subtraction	4 - 2 = 2
±	Plus - Minus	Both plus and minus operations	3 ± 5 = 8 or -2
±	Minus - Plus	Both plus and minus operations	3 ∓ 5 = -2 or 8
*	Asterisk	Multiplication	3 * 4 = 12
×	Times Sign	Multiplication	3 x 4 = 12
⋅	Multiplication Dot	Multiplication	3 ⋅ 4 = 12
÷	Division Sign / Obelus	Division	4 ÷ 2 = 2
/	Division Slash	Division	4 / 2 = 2
—	Horizontal Line	Division / Fraction
Mod	Modulo	Remainder Calculation	7 mod 2 = 1
.	Period	Decimal point, decimal separator	2.56 = 2+56/100
ab	Power	Exponent	22 = 4
a^b	Caret	Exponent	2 ^ 3 = 8
√a	Square root	√a ⋅ √a  = a	√9 = ±3
3√a	Cube root	3√a ⋅ 3√a  ⋅ 3√a  = a	3√8 = 2
4√a	Fourth root	4√a ⋅ 4√a  ⋅ 4√a  ⋅ 4√a  = a	4√16 = ±2
n√a	n-th root (radical)		for n=3, n√8 = 2
%	Percent	1% = 1/100	10% × 30 = 3
‰	Per-Mille	1‰ = 1/1000 = 0.1%	10‰ × 30 = 0.3
ppm	Per-million	1ppm = 1/1000000	10ppm × 30 = 0.0003
ppb	Per-billion	1ppb = 1/1000000000	10ppb × 30 = 3×10-7
ppt	Per-trillion	1ppt = 10-12	10ppt × 30 = 3×10-10