• ← Return
• → Throw

Switch

WMA link

Switch[expr, $pattern_1$, $value_1$, $pattern_2$, $value_2$, ...]

yields the first value for which expr matches the corresponding pattern.

• • Switch[2, 1, x, 2, y, 3, z]

• • Switch[5, 1, x, 2, y]

• • Switch[5, 1, x, 2, a, _, b]

• • Switch[2, 1]

Notice that Switch evaluates each pattern before it against expr, stopping after the first match:

• • a:=(Print["a->p"];p); b:=(Print["b->q"];q);

• • Switch[p,a,1,b,2]

• • a=.; b=.;