When the gamma function is evaluated at half-integers, the result contains π; for example Γ ( 1 / 2 ) = π {\displaystyle \Gamma (1/2)={\sqrt {\pi }}} and Γ ( 5 / 2 ) = 3 π 4 {\displaystyle \Gamma (5/2)={\frac {3{\sqrt {\pi }}}{4}}} .
Ketika fungsi gama dievaluasi untuk bilangan setengah bulat, hasilnya berisi π; sebagai contoh Γ ( 1 / 2 ) = π {\displaystyle \Gamma (1/2)={\sqrt {\pi }}} dan Γ ( 5 / 2 ) = 3 π 4 {\displaystyle \Gamma (5/2)={\frac {3{\sqrt {\pi }}}{4}}} .