python、C语言、fortran 三种语言的语法对比

 

Differences between Python 、

 FORTRAN and C

 

 

Operation	Python	FORTRAN	C
Computation of the logarithm base 10 of the input value with missing value management	log10()	LOG10()	log()
Computation of 10 raised to the power of the input value	exp10() or pow10()	POW(10, )	pow(10,)
Computation of input value1 raised to the power of the input value2	** (example: 10 ** 3) or pow(10, 3)	** (example: 10 ** 3) or POW(10, 3)	pow(10,3)
Missing value (-9999)	MissingValue	-9999	MISSING_VALUE
Conditions	if perm <= 0 or permMin == MissingValue:     x = MissingValue elif perm > 1000:     x = MissingValue else:     x = log10(perm)     y = log10(perm) - permMin	IF ((perm.LE.(0)).AND.(permMin.EQ.( -9999)) THEN     x = -9999 ELSE IF (perm.GT.(1000)) THEN     x = -9999 ELSE     x = LOG10(perm)     y = LOG10(perm) - permMin ENDIF	if (perm<=0|| permMin == MissingValue) { x = MissingValue; } else if (perm > 1000) {   x = MissingValue; }   else   { x = log10(perm);   y = log10(perm) – permMin; }
Logical operator - or	or	.OR.	||
Logical operator - and	and	.AND.	&&
Logical operator - not	not	.NOT.	!
Comparison operator - equal	==	.EQ.	==
Comparison operator - different	!= or <>	.NE.	!=
Other similar comparison operators	<, <=, >, >=, (...)	.LT., .LE., .GT., .GE., ...	<, <=, >, >=
Assignment operators	=,+=, -=, *=, /=		=,+=, -=, *=, /=
Temporary "variable" creation	a = 10	REAL|INTEGER a a = 10	int a =10;
Temporary "list" creation, append operation and display	a = [] a.append("Well1") print a		char a[10]; a="Well1"; printf(“%s”,a);
Output display	output("Hello world!") or print "Hello world!"	PRINT 'Hello world!'	printf("Hello world!");
Loop	for i in range(i1, i2, inc):	DO i = i1, i2, inc END DO	for (i=i1;i while(i
Comment	#{comment until the end of the line}	C in the first column	//{in the first column}   /*…….*/{comment during the two symbols}