Python For Loop:
If a sequence contains an expression list, it is evaluated first. Then, the first item
in the sequence is assigned to the iterating variable iterating_var. Next, the statements
block is executed. Each item in the list is assigned to iterating_var, and the statement(s)
block is executed until the entire sequence is exhausted.
for iterating_var in sequence:
statements(s)
Example:
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| n=input("Enter the value:")
for i in range(n):
print "i:",i
str1=raw_input("Enter the String:")
for i in str1:
print "i:",i
n=input("Enter the value:")
l=[]
for i in range(n):
en=raw_input("Enter the String:")
l.append(en)
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Prime Numbers:
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| for num in range(10,20): #[10,11,12,12,....19]
for i in range(2,num):
if num%i == 0:
break
else:#else for
print "prim Num",num
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Fibonac Series :
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| def fib_gen(n):
#fib 0,1,1,2,3,5...
l=[0,1]
for i in range(2,n):
fib=l[i-1]+l[i-2]
l.append(fib)
return l
n=input("Enter Number")
l=fib_gen(n)
print "Fib List:",l
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While Statements :
Statement(s) may be a single statement or a block of statements. The condition may be any expression, and true is any non-zero value. The loop iterates while the condition is true.
When the condition becomes false, program control passes to the line immediately following the loop.
while expression:
statement(s)
Example:
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| a=1
while a<10:
print a
a=a+1
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Prime Number using while:
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| a=10
n=200
b=1
while a< n:
c=2
while c<a-1:
if a%c==0:
break
c=c+1
else:
print "Prime:",a
if b==10:
print ">>",b
break
else:
b+=1
a=a+1#a+=1
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| c=1
l=[]
p="="*30
n=raw_input("Enter number how many std ")
while c<int(n):
name=raw_input("Enter Name")
age=raw_input("Enter Age")
l.append({'Name':name,"Age":age})
c=c+1
print p
print " Std Details "
print p
for i in l:
print i['Name']
print i['Age']
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