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Factorial

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Factorial

2. FORTRAN Program for Factorial Calculation

Write a FORTRAN Function FACT with one Integer parameter N, that computes the factorial of N and prints suitable message.

Ans :

C*****FORTRAN FUNCTION FACT

     

FUNCTION FACT(N)

 

C*****INITIALISE FACT FOR N 

IF (N .LE. 0) THEN

FACT = 0

WRITE (*,*) 'N <=0 AND FACT = 0'

GO TO 100

ELSE FACT = 1

END IF

DO 50 I=1,N

50          FACT = FACT*I

C***** PRINT RESULTS

WRITE (*,*)'THE FACTORIAL OF NUMBER N=',N,'IS=',FACT   

100          RETURN  

END  

 

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