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## Tests : ==, !=, >, >=, <, =<

==, !=, >, >=, <, =< are infixed operators.
a==b tests the equality between a and b and returns 1 if a is equal to b and 0 otherwise.
a!=b returns 1 if a and b are different and 0 otherwise.
a>=b returns 1 if a is superior or equal to b and 0 otherwise.
a>b returns 1 if a is strictly superior to b and 0 otherwise.
a<=b returns 1 if a is inferior or equal to b and 0 otherwise.
a<b returns 1 if a is strictly inferior to b and 0 otherwise.
To write an algebraic function having the same result as an if...then...else, we use the boolean function ifte.
For example :
f(x):=ifte(x>0,true,false)
defines the boolean function f such that f(x)= true if x ]0; + [ and f(x)=false if x ] - ;0].
Input :
f(0)==0
Output :
1
Look out !
a=b is not a boolean !!!!
a==b is a boolean.

suivant: Boolean operators : or monter: Booleans précédent: The values of a   Table des matières   Index
giac documentation written by Renée De Graeve and Bernard Parisse