# C program to print all prime numbers from 1 to 100(Using For Loop)

### Solution : Without using function Program/Source Code

```#include <stdio.h>

int main()
{
int n=2,i,z=0;
for(n=2;n<=100;n++)
{
z=0;
for(i=2;i<n;i++)
{
if(n%i==0)
{
z=1;
break;
}
}
if(z==0)
printf("%d, ",n);
}

return 0;
}
```

## Output:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97,

# C program to print all prime numbers from 1 to 100(Using While Loop)

### Solution : Without using function Program/Source Code

```#include <stdio.h>

int main()
{
int n=2,i,z=0;
while(n<=100)
{
i=2;
z=0;
while(i<n)
{
if(n%i==0)
{
z=1;
break;
}
i++;
}
if(z==0)
printf("%d ",n);
n++;
}

return 0;
}
```

## Output:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97,

# C program to print all prime numbers from 1 to 100

### Solution : Using function Without Passing Arguments Program/Source Code

```#include <stdio.h>
void check()
{
int n=2,i,z=0;
for(n=2;n<=100;n++)
{
z=0;
for(i=2;i<n;i++)
{
if(n%i==0)
{
z=1;
break;
}
}
if(z==0)
printf("%d, ",n);
}
}

int main()
{
check();
return 0;
}
```

## Output:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97,

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